Don't let the lakes' beauty fool you, though. In addition to being highly acidic, the lakes have been the site of phreatic eruptions in the past, a phenomenon in which volcanic activity instantly vaporizes the water, causing an explosion of steam, acid, and dislodged skeletons at the surface. So if you do plan on making a trip out to observe their bizarre majesty, make sure you don't actually stand anywhere near them.

Neil/Wikimedia
RIP, Kermit and Rowlf.

As if in response to their collective shrug, two more Siberian pits of darkness opened up, further confounding any analysis. The interior structure of these holes is so peculiar that some researchers believe them to be a brand-new type of sinkhole, never before documented. Exploration into the ground caves (or "Earth anuses," as they are not known within the scientific community) found an icy lake 230 feet below the surface, which was presumably full of ghosts.

Uralkali Press Service
The sudden appearance of giant death cavities was part of a membership drive.

Conflicting reports place the largest of the sinkholes at between 200 and 260 feet wide. Also, unlike standard sinkholes that just kind of swallow everything around them like the worms from Tremors, the Siberian Titan Hole appears to have ejected the soil into the area around it like a subterranean shotgun blast. The current theory is that a huge amount of methane gas collected in a hollow underground pocket and eventually exploded at the surface. Basically, scientists have more or less confirmed that there's an invisible farting giant living in the center of the Earth.

AP via telegraph.co.uk
And he's hoping to re-create goatse with actual falling goats.

OK, we don't think they were actually made by aliens. But nobody knows who did make them, and they're weird as hell. The field of massive stone jars, which are estimated to be about 3,000 years old, was discovered by a French archaeologist in the 1930s in the Xiangkhouang province of Laos:

Oliver Spalt
He initially assumed they'd been made by a tribe of lost, genius Frenchmen.

Since their discovery, no one has been able to identify the purpose of the jars or the civilization responsible for their creation. Stranger still, these jars are so finely constructed, researchers say, that carving them would have taken a near-impossible effort with the technology of the time. A few appear to have been made with some kind of enormous lathe, which is just ... just ridiculous.

Oliver Spalt
They had gigantic stone lathes in ancient Asia, right?

The largest of the jars is just over nine feet tall, which is probably enough to hold all of the jam produced in the past 10 years. They appear to have once included lids, and many of them are decorated with depictions of humans, animals, and other embellishments. There are local legends that say the jars once contained wine for an ancient emperor, but their real purpose might be more grim, as archaeologists have found human remains inside many of the empty vessels, although the bodies could have been placed inside centuries later. It could be that the jars were built to hold both wine and corpses, which raises infinitely more questions.

Joe Ray/NY Times
A nine-foot mountain jar would hold entirely too much of either thing.

The most obvious explanation is that the jars were part of some sort of funerary ritual, but even that still leaves a handful of unanswered questions. How were the jars constructed? Were they built by slaves or by the community? Does the size of the jar correspond to the importance of the person (or persons) within? Could you have a custom engraving on your jar, or were you limited to what the giant jar store had in stock?

It's difficult to say with any certainty, because we still don't have any solid evidence about who built the jars in the first place. Furthermore, extensive research is kind of difficult, because the area where the jars are located is still littered with unexploded bombs from the Laotian Civil War. "You might suddenly explode at any given moment" doesn't exactly inspire too many people to sign up for an archaeological expedition.

Mattun0211/Wikimedia
What, you're not willing to get blown up for a chance to look at ancient rock jars?

Though their narrow bases and curved, drunken posture make them look as if they are on the verge of collapsing at any moment, the Manpupuner Formations are solid enough that centuries of wind, snow, and time have yet to topple them. The commonly agreed-upon theory is that the rocks were formed over millions of years of erosion; however, as we previously mentioned, they are in the middle of a flat grass ocean. There aren't any other rock formations for miles around, let alone anything like the giant flint titan boogers pictured here.

Republic of Komi
This one is apparently on its way to pick up beer for the rest of the group.

So how the hell did they get there? Clumsy aliens? Dinosaur art students making an esoteric installation piece? While we wait around for science to come up with a more plausible explanation, the rest of the world has wasted no time in exploiting the Manpupuner Formations for dumbshit things like scaling them in the name of Red Bull, which world-renowned mountain climber Stefan Glowacz did back in 2013. Glowacz later said that, in 30 years of globetrotting mountain domination, he'd never seen a similar rock formation.

When an eccentric German adventurer tells you he's never seen anything like the Manpupuner Formations before in his life, it's time to pay him for a second trip up that stone colossus to search around for weak points.

Klaus Fengler/Red Bull Content Pool
"It should be glowing. When you find it, mash the X button."

At first glance, Ringing Rocks Park in Upper Black Eddy, Pennsylvania, just looks like a collection of mismatched boulders sitting in a dry river bed. Yet visitors come with hammers in hand from miles around to see these gray-red boulders. Why? Because when struck with a hammer or similar tool, many of the rocks produce unique, audible "pings" that sound eerily like ringing glass or plinking piano keys:

Yes, for reasons unknown to man or beast, these rocks can sing, giving an entirely new meaning to the term "rock opera."

Andrew Stroud
Amazingly, that pun was less obnoxious than an actual rock opera.

Like the most obtuse video game puzzle brought to life, nothing about the appearance of these rocks suggests there's anything unusual about them, and their musical resonance seems to occur for no real reason beyond terrifying the deeply superstitious. Much scientific work has gone into determining what's special about these particular rocks, and many plausible theories abound. But much to researchers' bewilderment, the magical singing rocks of mystery refuse to make any kind of scientific sense.

The structure of the boulders isn't vastly different in any way from an average rock, and even the most far-fetched possibilities -- abnormal magnetic fields, radiation, tiny singing pixies entombed within the stones -- have been ruled out. The most plausible theories have to do with boring things like iron content and stress levels within the boulders, but we like to focus on the curious lack of plant and animal life in the vicinity of the rocks. One scientist noted that during his visit, he saw no birds fly over the boulder field and observed no bird droppings on any of the rocks there.

Mike Parker
Certainly that has nothing to do with the groups of people milling around banging hammers on rocks.