The first declared National Monument in the United States.

On the windswept Dakota plains there is a memorial to circus workers who were struck down by lightning.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A lone bronze figure stands in memory of historic a 19th century land grab.

Hot Doug's "Hot Dog" Stand.

To find the "unicorns of the deep" you've got to go downstairs.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

When waves crash onto this section of beach, the rocks sing a song.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.