The oldest funicular in Lithuania has been climbing this steep hill since 1931.

A winding path built in secret on the edge of the continent.

Resting place of Hollywood's immortals is also site of summer film screenings.

Site of a former hidden treehouse in New Orleans.

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

The United States Capitol's former columns still stand.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The world's largest collection of witchcraft regalia.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A psychedelic labyrinth on the San Francisco bay.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Tucked in the back of this amazing antique store is an important piece of medical history.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A crumbling hospital from the 1850s on Roosevelt Island.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Most-visited and most-photographed slot canyon in the American Southwest.

An emerald-green grotto just a short trip from Austin.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

Rippling sand dunes frozen in the Arizona rock.

World's largest collection of serial killer artwork and other macabre exhibits.

An artsy hidden staircase leads to breathtaking views of San Francisco.