For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

This enormous censer uses a pulley system installed over 400 years ago.

Iron Age runes and ruins hide in plain sight along this Portuguese beach.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

A hidden three-foot-wide house separates these two regal churches.

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

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

Tucked among the sand dunes overlooking a Welsh beach, a real-life tribute to a fictional elf.

One of the largest Roman settlements in Portugal.

The world's oldest bookshop still in operation.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

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

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Once used to protect important Roman trade routes.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Cut into a sheer cliff face, these stairs are the only way to reach a secluded Scottish harbor.

After protestors toppled a statue of a 17th-century slave trader, the pedestal where it once stood remains unoccupied.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.