From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

The hallucinogenic center of the ancient world.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

Monasteries on rock pillars, once accessible only by frayed ropes.

The site of Paul Revere's historic two lantern warning.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Once America's tallest structure, now a Baltimore landmark.

A giant Troll lurks under one of Seattle's oldest bridges.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This former coal gasification plant found a curious second life as a popular public park.

A museum dedicated to the history and exploration of both popular music and science fiction.

A wall of chewing gum moonlights as collective art.

Site of the greatest known waterfall that ever existed.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This playground sculpture of an icon from the past is dedicated to the children of the future.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

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

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

This turn of the century masterpiece has a mysterious goaty interloper.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.