Climb to the top of its spiral spire for spectacular views of Copenhagen.

The house where a Danish physicist discovered the connection between electricity and magnetism.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

The largest collection of historical roller skates in the world.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

San Diego's most historic and haunted home.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

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

Take a dip in the world's largest mineral hot springs pool.

This super steep hike ascends 2,000 feet in less than a mile.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The largest self-built castle in the U.S., six decades in the making.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

The mysterious round rocks of Schooner Gulch.

Watch the newest land on the planet form before your eyes.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This legendary urban waterfall creates a dazzling display of rainbows.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

This tiny Hawaiian island is slowly coming back to life after being bombed during naval training exercises.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

Temporary Burning Man sculpture made of two 18-wheelers.