At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

This former office building has been transformed into an immersive music venue and art space.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

Nature and art meet in this curvy creation

A medical facility that has been kept frozen in time.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A whimsical village of unique treehouses resides in a Washington forest.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

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

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

Odd outsider art installations surround a Gold Rush-era ghost town.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A modernist landscape of water and sci-fi concrete.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The angel of death appears to weep black tears at this grave marker.

All that's left of the quintessential "cabin in the woods."

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.