During the holidays, a vintage subway train whisks New Yorkers back in time.

Its dark depths conceal millions of rare, delicate crystal formations.

The first U.S. town to secede from the Union, only to vote themselves right back in.

War prevented this Polish composer's body from being returned to his home country for 51 years. Though his ashes eventually made it home, his heart stayed behind.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

This candy-pink cathedral of Da Nang is also known as the Chicken Church.

These charming mailboxes became social media stars after a typhoon failed to topple them.

This densely-packed cluster of buildings was saved from the wrecking ball and turned into an art community.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A series of sculptures beneath the waves promote ocean conservation and support coral reefs.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

At 207 feet, one of the world's longest continuous escalators.

A computer bug so primitive it was an actual insect.

Ghost town with a beer-drinking goat for mayor.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

The final resting place of a young stagecoach robber who refused mercy.

"Leave a He-Man, Take a Transformer" and share a story about your real-life superhero.