The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The celebrated eyesore created by starry-eyed sweethearts.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Half of a waterfall goes into the river while the other half seems to disappear.

An experimental, automotive replica of Stonehenge.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The first declared National Monument in the United States.

A fitting attraction for the corn capital of the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The king of U.S. high points towers over every other peak on the continent.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Drift through decades of high desert music history at this funky hometown museum.

A memorial dedicated to the victims of the Columbine High School shootings.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

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

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Daily jousts and dancing barrel makers in Munich's mechanical clock.

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

This elaborate towering structure was once famed for its revolutionary height.