A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This futuristic German television spire is actually the world's largest digital clock.

Tiny castle in the middle of the Rhine made you pay to pass.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The fairy tale castle of the "fairy-tale king."

As one of the world's largest hydroelectric dams this plant took two countries to get built.

An art museum with an eclectic design and a scandalous past.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Vines grow up the metal bars in this public park created from an old machine factory.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

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

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

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

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

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

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Cozy basement bar sports an inventory of over 2,000 beers.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.