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

The world's oldest bookshop still in operation.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

Founded in 670, this ancient mosque is an architectural time portal.

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

The largest salt lake in the Sahara is mysteriously alluring.

The busy transport hub is home to the tallest airport slide in the world.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

The world's most famous cheese caves.

The world's tallest bridge is also possibly the most elegant.

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

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

An exploration of Malaysian heritage through the lens of traditional textiles.

A stunning Victorian abbey and walled garden on a lakefront.

The floor of this spectacular Baroque sanctuary is covered in memento mori.