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

Northern Ireland's Brobdingnagian stepping stones.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Less a museum than a bizarre fantasy world created by artists and engineers.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A mechanized clock where a man fights off a dragon, crab, and rooster.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A hip bar decorated with walls of golden skulls.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

A modernist landscape of water and sci-fi concrete.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

World-famous, Pink's still manages to keep its prized cult fetish status.

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

Tiki luxury on Nob Hill.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A rare view of a preserved Victorian science museum.

The first declared National Monument in the United States.

A beautiful 62-acre Catholic shrine and botanical garden.

Museum preserving torture methods from the past.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.