A nightmare for the claustrophobic lies hidden in Southeast Asia.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

One of the first big sculptures anywhere in Australia.

A self-funded cemetery with a long list of inhabitants.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

Three-story concrete ram with a permanent gift shop.

Children's playground hidden under a big pink and blue cap.

Fire meets ice at the southernmost volcano on Earth.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

Southern Ocean waters and glacial forces transform the Antarctic ice into these stunning bridges and caves.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

The place of worship erected not once, but three times in one of the most desolate places on Earth.

A wooden hut from the Heroic Age of Antarctic Exploration.

An artist's cute bronze subway sculptures belie his violent artistic past.

Elevated freight railway turned wildly successful urban park.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A hidden "place of interment for gentlemen."

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Salute the leader of the proletariat.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.