This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

A place to learn about the history and culture of Mexico's largest Anabaptist group.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A curious building honoring past and current members of a historic musical comedy troupe.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

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

Dr Barnes' $25 billion private collection of art and arboretum.

Huge masonic hall in Philadelphia with lavishly themed rooms.

Hot springs monkey spa in the middle of Hell's Valley.

Elevated freight railway turned wildly successful urban park.

A bizarre house filled with an astounding array of collections.

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.