A colorful architectural gem in Seattle's uniquely modern Central Library.

Most famous work of one of Frank Lloyd Wright's sons.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The largest drain hole in the world.

An extraordinary mixture of natural beauty and man-made phenomena.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

A castle built by an eccentric medieval enthusiast in rural Ohio.

This glamorous old building is said to have inspired the Tower of Terror.

One man's ambition created this psychedelic log home.

New Orleans' famous cemetery, located on the site of a former race track.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

Magical-looking cottages that inspired one of the most famous animated films ever.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

An enormous park-like oasis, full of famous Chicagoans' graves.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

See massive fossils that are over 200 million years old in northeastern Arizona.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

These eerie outliers of the lightning bug family glow a mysterious blue color.

A modern mechanical planetary system, part of a 10,000 year clock.

Visible below the waves are memorials to the city's Gold Rush dead.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.