One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

Sweden's oldest street has not changed for nearly a millennium.

A striped 12th-century basilica sits in the countryside of Sardinia.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

The ruins of an early-18th-century complex that could once house up to 12,000 horses.

Built by the Portuguese colonists in the early 16th century, this fort is one of the oldest European structure in Asia.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

A colossal statue with a controversial past, forgotten for more than 30 years.

This small island off Lambert's Bay is home to more than 2,000 Cape gannets and is the only such breeding colony open to the public.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

A British general, a suggestive tree, a map of paradise.

This vestige of Seychelles’s colonial past now resides in a busy intersection and didn’t chime for its first 96 years.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Elaborate tile work in this railway station tells the story of Portugal.

The corpse bride of Portugal.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

A unique seaside cave where Aleister Crowley faked his own death.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.