After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

A wooden rollercoaster that still delivers a thrill.

A Manhattan tombstone honors a popular 19th-century heroine, now long forgotten.

With a history dating back to Victorian times, this architectural gem is a rare New York tourist haunt worth visiting.

The secret behind these nostalgic light fixtures: They're not as old as they may seem.

A dazzling work by a Pop art legend hangs in one of the world’s busiest subway stations.

The Pickle Guys stand as a salt-stained holdout of the Lower East Side’s historic pushcart culture.

This reconstructed Revolutionary War-era residence marks the first major battle after the Declaration of Independence

An 18-meter-long sarcophagus of a constantly growing dead prophet.

The Avenue of Mausolea is a series of grand palatial tombs.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

Prowl through this sprawling bazaar under a massive Soviet-era dome for delicious eats.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

Unusual building appears to be haphazardly built from randomly piled bricks.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

1513 Turkish world map, full of European state secrets and snarky commentary.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

With over 10,000 lights, this engineering marvel lights up the city after dark.

The only Roman honorific column in Istanbul.

A marvel of Byzantine engineering under the streets of Istanbul.