Four miles of pipelines form the model of still-functioning retro-tech efficiency.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

The smallest post office in the United States is no bigger than a broom closet.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

The best place to send your postcards home from Antarctica.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

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

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

An extraordinary library and archive dedicated to the history of the Arctic and Antarctic poles.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This museum on a college campus pays tribute to the Arctic and to two explorer alumni.

Final resting place of Antarctic explorer Ernest Shackleton.

The bodies of some early polar pioneers are still buried beneath the harsh snows of the Antarctic.

A wooden hut from the Heroic Age of Antarctic Exploration.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

This grave marks one of few bodies retrieved from the disastrous Franklin Arctic expedition.

Fire meets ice at the southernmost volcano on Earth.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

A cliff-hanging restaurant.

An eatery for UFO seekers on the Extraterrestrial Highway.

A pub that is literally in the middle of nowhere, but continues to do business.

One of the world's southernmost bars.