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

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

These disused steel furnaces are now haunting ruins that may one day be a national park.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A beautiful oddities shop crammed with strange and morbid curiosities.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A toxic ghost town sitting atop a massive coal fire.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

An exquisite and eclectic selection of African masks stands out within a massive woodcarving marketplace.

Arrogance and quarreling are forbidden near these three sacred waterfalls.

One of the largest concentrations of rock paintings in Southern Africa.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

There is only one place in the world where the corners of four nations come together.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

A volcanic landmark located on an Ice age lake bed.

The world's last remaining store of its kind.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

A sprawling cave network created by a lone lava tube.

The short-lived railroad town in central Oregon has been abandoned since the 1930s.