A Christian monastery stands on what was once a holy Incan temple.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

An ancient burial ground believed to have been used for ritual sacrifice.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

A beloved tribute to the Fab Four and the freedoms they inspired.

Enormous statue of the Emperor of the Mongols.

The world's second-tallest flagpole stands proud despite dropping rank.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

The Avenue of Mausolea is a series of grand palatial tombs.

Light still pours into the ruins of this ancient Islamic observatory.

A fiery crater has been burning in the Karakum Desert since 1971.

Fascinating town where normal life interfaces with the occult.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

Dedicated to the legendary comedian Eric Morecambe depicting his iconic "Bring Me Sunshine" stance.

A remarkable medieval structure born from a 14th-century disaster.

This striking steel sculpture transforms environmental data into art.

This little-known hero has been protecting "The Fens" for close to 400 years, and now from its most powerful challenger yet: climate change.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

In this historic region, homes and churches are carved into ancient volcanic rock formations.