These passages carved from the Antarctic ice hold strange shrines to the harsh southernmost climes.

Fascination continues to surround one of history's most infamous shipwrecks.

The world's second-largest excavated hole.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

Remains of an abandoned coral city.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

This former stomping grounds of the most eminent astronomers of the early 20th century.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Small church on top of a huge rock column.

This amazingly preserved Gold Rush town is a historian's dream.

An unassuming grey box sitting on San Francisco's Pier 17 is a "sky diary" of the coastal city's temperamental weather.