42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

This sandstone mansion was the home of two of Oregon's most important pioneers.

10,000 flowered plants bloom in the City of Roses.

The magic's in the hole!

A graffiti Mecca welcoming artists from around the world.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Elevated freight railway turned wildly successful urban park.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.

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

An urban laboratory.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

The medieval woodcut-style artwork chronicles life in medieval London.

London's marvelous wildfowl reserve along the Thames.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

A famous burial ground with a history both grim and literary.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A cluttered and astounding collection of antiquities and curiosities.