This triumphal arch is the only fully standing structure that remains from Roman-era Oea.

A deserted Bedouin village lines the shores of this stunning desert oasis.

Magnificent Roman ruins lie vulnerable to destruction on the edge of the Mediterranean.

Surrounded by a smudge of dark earth, this isolated volcano sits in stark contrast to the surrounding Sahara.

A fortress-like granary that has been continually in use for more than nine centuries.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

Landscape of bizarrely shaped desert mountains and innumerable rock carvings.

These delicate sand pyramids look like naturally occurring gothic spires.

Hidden in the hills is a mysterious stone structure, known only to a few.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

The rocks in this arid basin leave trails of movement behind them.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

An Italian hillside ghost town.

Ride a boat through this magnificent underground world, which now doubles as a theater.

This ancient city was home to one of the greatest schools of Greek philosophy.

A group of medieval rock-cut Buddhist statues created to save people from the volcanic hell that surrounds them.

Home to 800-year-old zen basin, a 400-year-old pilgrim’s path, and a century-old industrial grotto.

Haunted by a giant white snake, this pond is said to bring the rain and pubic hair.

An eerie cluster of medieval cave-like tombs carved out of a cliff, hidden in a historic mountain pass.

An eclectic temple with Chinese architecture, Korean lion-dogs, an Indian god and a legendary 700-year-old tree.

One of the only two archaeological sites in Japan to feature petroglyphs, which some believe to be a long-lost writing system of the gods.

A lone torii arch stands on a coastal rock where a deity is said to have landed.

A network of ancient tunnels and vaulted chambers with mystical Buddhist reliefs, built for ascetic training.

This massive, Edo Period, coin-shaped sand painting is believed to be a source of great luck.