One of the deepest blue holes in the world.

Stay in your own little bubble.

This remote mountain shrine is one of the most sacred Zoroastrian temples remaining in the world.

Iran's colorful terraces are a rare geological masterpiece.

An ancient sanctuary that has long been a holy site for the Chaldean Christian Church.

9th century Abbasid mosque, damaged in modern warfare.

Ancient rock-cut tomb? Definitely. That of a great Median king? Unlikely.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

This rare collection of human deformities displays fetuses with two faces, one eye, and "mermaid" legs.

Last remaining nuclear missile base in Ukraine.

Slum Settlement Filled With Mountains of Garbage.

Giant pigeon houses packed into city streets in Egypt.

A market built atop boats is one of the few floating holiday markets in Europe.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

Staves, storm-calling, and of course, necropants.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

Survival capsules find a second life as a unique hotel.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An eerie, derelict amusement park in Berlin.

This underground transport hub doubles as an art gallery.