A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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

A little sculpture with a large wardrobe.

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

France's national museum of scientific and industrial instruments.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A symbol of Texas pride.

A city park that sits on top of a freeway.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Belly up to the bar in Cowtown, don't forget to buy some boots.

This downtown Dallas art installation is always on the lookout.