The largest collection of two headed animals in the world.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

This unusually shaped mountaintop tower looks like a UFO floating over the city.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A spiral staircase twists to the top of this unusual Czech lookout tower.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This former quarry is now a picturesque gorge that hides a sunken lake.

A Jenga-style cylindrical tower of books that appears to go on forever.

Two monstrous faces loom over a village in Czechia.

Longest fortress system anywhere in Europe.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

The remains of a sunken military ship wreck visible through clear water.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

An ethereal glowing blue ocean cave in Croatia.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

Apartment complexes built into huge repurposed natural gas tanks.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.