6 Hidden Networks Buried Beneath Famous Landmarks

6 The Giant Salt Mine Under Lake Erie

We don't normally associate mines with evil, and if we do, it's usually the child labor kind, not the fun eldritch kind. But one look at the Morton Salt Mine and you just know that an ancient evil is getting ready to burst free from its deep, dark, hypertension-inducing depths.

2000 feet underneath Lake Erie (because evil loves its puns), the Ohio mine stretches out for three miles. The only way to get to this portal to a salty hell is with a four-minute elevator ride, a series of airlocks and sudden primal fears of Stygian abodes. Fresh air has to be pumped down to the miners, who are also required to carry an hour's worth of emergency oxygen. Not that that's going to do them much good when they dig too deep and awaken a giant hungry dragon.

That all feels like a lot of hassle for salt. Even their equipment makes it look like they're burrowing through an ancient alien installation in search of advanced technology, rather than in search of french fry seasoning.

The mine produces five million tons of rock salt a year. Despite that output, the mine is sparsely populated with many tunnels left unexplored. Which leads us to assume that at least one person has wandered too far into the abyss and re-emerged months later more salt than man, babbling nonsense about the sodium gods of the ancient times.

Okay, in reality, it's probably innocent enough, but if someday the government reveals a salt-powered superweapon capable of destroying the entire planet, maybe postpone that Great Lakes fishing trip for now.

5 The Giant Nuke Bunker Under A Quiet English Town

Remember that dark time in history when humanity feared a nuclear apocalypse? Oh right, we need to be more specific now -- we're referring to the Cold War. Worried that the United States and the Soviet Union couldn't keep it in their silos, the British government built a shelter called Burlington for the Prime Minister, his Cabinet and 4,000 government employees near Corsham in Wiltshire. (You may recognize this as the most British-named town in history.) It was constructed between 1956 and 1961, but remained classified until 2004, at which point enough time had passed that the government saying "Hey, we built a secret shelter we could be rushed to so we could live while you all died horribly" was a neat little factoid instead of an awful admission of human egotism.

Designed to enable the government to keep sending orders topside for up to three months, Burlington is over a kilometer (0.62 freedoms) long and featured fun amenities like a bakery, darkroom, library and a "VIP Room" (how shitty would it feel to be one of few people chosen to ride out a nuclear apocalypse, but still not be allowed in the VIP section?). Purportedly, it also had a pub called the Rose and Crown, because the Atom and Mutant would have been too on the nose. The whole project was so secretive that not even most of the people picked to live in it knew about it, which does explain the VIP room.

The British government has stopped funding Burlington, and it's falling into disrepair. So if you're looking to unleash an evil scheme upon the world and don't mind working with technology that hasn't been updated since the '80s, there would be an undeniable dramatic irony in buying up Britain's own government fallout shelter to wage supervillainy against them. The government even put it up for sale in 2005, then quickly pulled it off the market. Probably because they only got one offer from a certain E.S. Blofeld looking to trade his mountain home in for a place with an easier commute.

4 London Has An Entire Network Of Subterranean Mail Rail Tunnels

London is famous for what we believe is referred to as the Underground Railroad, a series of mass transit "tubes" engineered by Harriet Tubman. But the elaborate subway system has a dark secret. Inside its bowels rests the transportation equivalent of a deformed sibling that's kept locked away in the basement. Meet the London Post Office Railway, aka the Mail Rail, aka the proposed setting of the scraped C.H.U.D. III: Flesh and Chips.

The tunnels were used by tiny automated trains to move mail around London, because the mail industry, much like the meat industry, is best left hidden in the shadows, away from everyday civilians who would be shocked and appalled by the harsh realities of the work.

Here's a man standing in one, to give you a sense of weird yet adorable scale.

The whole thing is like a Pixar movie about the secret world of tiny trains, and those tiny trains subsequently being devoured by the monsters from a Guillermo del Toro film.

They'd make a great setting for the next Bond movie. Imagine the thrilling underground chase from Skyfall, except that Bond is hunched over and constantly bonking his head. Or how about the next Fallout or Metro game being set in a grim post-apocalyptic London where only little people survived? Alternatively, London is planning to open certain sections of the tunnels to tours later this year, so if none of your ideas strike your fancy, you could always go check them out yourself, then sneak away into the shadows to become yet another postmoleman still roaming the tunnels.

3 There's A Functioning Maze Of Tunnels Under Downtown Los Angeles

If you've ever been to Los Angeles, you quickly find Angelinos drive everywhere. The city isn't exactly pedestrian friendly. Except that it is, just not anywhere where the sunshine can reach you. Apparently, no modern world city is complete without both a famous symphony and a secretive network of underground tunnels that would be perfect for nefarious purposes.

That's part of a series of pedestrian tunnels focused around government buildings in the downtown LA area. Technically they're closed off to the public, but no one's going to stop you from wandering in and stumbling across abandoned government files, weird stretches of emptiness, and forgotten treasure troves of gold seized from old gangsters (possibly).

Government workers use them to move files between buildings and some even jog in them when they need to exercise and both the gym and the outdoors are just too pleasant and inviting. Also, movies have been filmed there; they were used for air raid drills; the homeless have been temporarily sheltered in them; and, back in the '50s and '60s, they were used to shuffle infamous criminals from holding cells to the courthouse. In 1960, when property taxes were still paid with cash, the government carefully moved a billion dollars through the tunnels in the middle of the night, in a top secret operation that took three months to plan.

In less verified stories, the tunnels were supposedly also used to run hooch during prohibition, Charles Manson's followers were said to have plotted to bust him out of jail by using them, and in one abandoned tunnel, all the beautiful actors and actresses come together once a month to make fun of your Facebook pictures.

2 The Kansas City Business Complex Of Subtropolis

Hey, so, there's a 55 million square foot business complex 150 feet beneath Kansas City. Yup, Kansas City. You'd think that Kansas City, whose official municipal motto is "We Have An Applebee's That's Open Until 8:30," would try to work that into their tourist brochure somehow. Because that's the thing with SubTropolis: It is open for business.

An underground data storage facility carved out of rock is begging to be raided by the Impossible Missions Force, and that's only the tip of the iceberg. Located in the remnants of an old mine carved out of 270-million-year-old limestone, SubTropolis has almost 14 million feet of space to explore, 8 million of which is still unused. Take one wrong turn, and your grandchildren will tell tales of the mythical sunlands as they live out their lives hunting rats in Sector 8620.

But before you start considering buying your own little plot of underground bunker in case society ever needs a hard reset, SubTropolis is strictly for business. The cave system is home to about 10% of Kansas City's commercial interests and the reason for moving their business into this underground wonderland might be the most boring one ever: to save on heating bills. Being underground keeps energy costs way down thanks to the consistent temperature, and it's great for storing sensitive material, because it's a gigantic underground maze.

Above you see a USPS stamp distribution hub, shelving space for the National Archives, and a library of old films that includes the original print of Gone With the Wind. But there's also a science center for kids ...

... and c'mon, the whole thing is obviously just a front for a Hank Scorpio-esque feat of villainy. Their official introductory video even calls it a "business labyrinth," so there's clearly a secret Flamethrower District that cameras aren't allowed to see.

1 Multiple Cities Are Built On Top Of Older Versions Of Themselves

Futurama fans will recall that the show's New New York is built atop the crumbling and largely forgotten ruins of Old New York. Well, that wasn't really a joke. While this New York is only built on broken promises and Dutch bitterness, other major American cities have been built over the remains of their older, ragtimier predecessors.

That's Old Sacramento, which, no, isn't buried under what is now East St. Louis, but actually the modern and vibrant city of Sacramento! Back in 1861-62, Old Sacramento was devastated by floods that killed thousands and left the streets underwater for three months. So, over the course of 15 years, two and a half miles of the city were raised by nine feet, because sometimes keeping mad scientists on the municipal payroll really pays off. Parts of Old Sacramento have been lovingly preserved, a permanent testament to America's history and a bygone way of life. Other parts of Old Sacramento look like you'll get de-boned by a fucking vampire if you're caught there past sundown.

Sacramento isn't the only city to find new life on top of its own corpse. The Great Seattle Fire of 1889 forced the city to rebuild 31 blocks, and while they were exploring bold ideas like "fireproof building materials," they also decided to elevate the city above the swampy tidelands the original streets had been built on. But by the time they started regrading the streets, some buildings had already been rebuilt, sort of like when your landlord didn't tell you that you were evicted until after you finished retiling your bathroom. That resulted in the Seattle Underground, a city below the city, once home to the urban blight of opium dens and gambling parlors, now home to the urban blight of tourists and the walking tours that prey on them.

Legend has it that, to this day, flannel-clad ghosts haunt the halls, understandably pissed that they rebuilt their banks and bars only to have their new windows open up into scenic concrete.

Indianapolis also has subterranean catacombs, where they presumably bury whoever finishes last in the Indy 500. In the late 1880s, The city built 20,000 square feet of corridors beneath its popular City Market as a structural foundation for Tomlinson Hall, a convention centre of sorts. Those corridors proved solid as a rock, supporting Tomlinson Hall right up until the moment it burned down in 1958.

The catacombs initially helped keep meat and produce fresh before it was brought up to be sold in the morning (don't forget to tell your fridge how much you appreciate it), then served as a homeless shelter in the brutal 1912-13 winter. They were used as a police firing range in the 1970s, hosted a Super Bowl party in 2012, and have no doubt been the site of countless teenagers getting a haunting first handjob, among other historic events.

Also, according to local legend, it's fucking loaded with ghosts, but that's probably safe to assume about everything we've just shown you.

Mark is on Twitter and has a book.

Also check out 5 Famous Cities With Creepy Secrets Hiding in Plain Sight and 6 Disturbing Abandoned Places (Hiding Right In Plain Sight).

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