Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The oldest known university in the world is in Fez, Morocco.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Traditional 11th-century outdoor tannery.

Crumbling necropolis set high above Fez.

The other side is actually green.

This bazaar is one of the oldest in the Arabian world.

A bloody history is captured in this former prison turned museum.

An ancient fortified mound raised over the millennia from settlements built one on top of the other.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

Resonant stone, that has been played since prehistoric times.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

A gigantic collection of teeny, tiny books.

A crumbling cathedral condemned by an earthquake.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

This indoor ski resort has a mountain contained inside a mall.

Whitewashed mosque contains the world's largest carpet.

Rusting railcars and locomotive equipment fill this Ethiopian train graveyard.