This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A second generation sun-powered marvel lights up the night.

Museum dedicated to the preservation of surf culture.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Giant, friendly pelicans in Central London, the most unlikely of places.

Eighty million natural history specimens call this gargantuan museum home.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum marks and documents the site of the Titanic's launch.

Northern Ireland's Brobdingnagian stepping stones.

One of Ireland's most infamous prisons for rebels including men, women and children.

The stunning interior of this Gothic church is covered in ornate gold details.