These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Electrical pylon in the shape of Disney's beloved mouse.

A building so large that it has its own weather.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

An underwater road considered a possible Atlantis location.

Beautiful hillside Vermont cemetery with amazing funerary art.

The world's largest piece of copyrighted artwork.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

After this historic church was destroyed by World War II bombing, its blackened shell was left standing as a monument.

A Nazi concentration camp and Anne Frank's place of death.

The fairy tale castle of the "fairy-tale king."

A preserved trolley track that was transformed into a museum of transportation.

A former copper mine which became a truly unsuccessful prison.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Boise State's stadium was the first non-green football field in the world.

For over a century, it has been a tradition to raise a flag at the top of this 450-foot sandstone pillar on the 4th of July.

A recreation of an Old West apothecary full of curios.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

This supermarket is suspended 25 feet above an interstate highway.

This site commemorates the birthplace of the game of basketball, invented by James Naismith in the winter of 1891.