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

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

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

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

The world's oldest bookshop still in operation.

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

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

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

Houses are tucked between, on, and underneath giant boulders.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A signal indicates the entrance to this alley, rumored to be a meeting place for witches.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

This Roman arena once played host to bloody gladiatorial battles.

A small house sits between two huge rocks, with its back to the sea.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.

This Canadian hunting lodge is a long way from home.

This memorial, built by fascist dictator General Franco in 1960, has been repurposed by the people of Catalonia.

These fly sculptures are scattered around the city and represent the patron saint of Girona.

A small house in Tazones, completely covered in shells.

32,000 tiny soldiers are posed in 23 historical settings.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.