This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This whimsical stacked cabin looks like something out of a children's book.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

The first (but not only) upside-down house in Germany.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

The world's only museum devoted to the wonders of fluorescence.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

These layered sandstone mountains in China look like they are made of pressed crayons.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A regular looking rock with an unbelievable history.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Bacteria and algae give the salty water its bubblegum hue.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Crushed coral and crystals give the sand its signature coloration.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A group of glacial erratic boulders are improbably balanced on white limestone pedestals.

This unusual rock formation looks like an apple that has been neatly sliced in half.

A steep and winding road in the Yorkshire Dales passes by these deep natural potholes.