This house renovated by Frank Lloyd Wright was the centerpiece of a lavish 20th-century estate.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

One of the largest Chinese cemeteries outside of China spent years overgrown and forgotten.

A strange egg in a mucky bog of western Ireland marks the spot of an aviation milestone.

A portal into the bricked up canal that runs through the heart of Washington D.C.

One of Vietnam's only mosques pays tribute to the country's Muslim minority.

Mongolian Buddhists believe this monastery in the Gobi desert to be the center of the world's spiritual energy.

A vibrant street away from the typical tourist track, lined with colorful, mosaic-covered houses.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

A tiny island is connected to the mainland by a private railway that residents travel in their own personal wagons.

Traces of the thriving lake trade that once linked the Soviet Union with Mongolia.

This magnificent abandoned hotel has long been haunted by its Nazi past.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

The last four extravagant street signs of London's historic banking street.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

An eerie collection of the surviving structures from a past celebration of the future.

China’s breathtaking futuristic library is lined floor to ceiling with fake books.

The celebrity luchadores of La Paz are tough ladies in traditional petticoats and braids.

An abandoned fishing village in pre-oil Qatar.