This Portuguese bullring is built right into the caldera of an island volcano.

An ode to a chess-loving diplomat.

The entrance to an early 20th-century cultural center features murals that deal with the cultural fusion that characterizes Mexico.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

This extraordinary art museum is like a secret world on the edge of Mexico City.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

An 11th-century medieval castle cascades over the town of Numão.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

This giant sculpture made of trash is a critique of society's wastefulness.

A small but charming botanical garden that contains many exotic plant species.

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

The corpse bride of Portugal.

Dead weights honor the dead of Portugal's fishing industry.

A museum dedicated to one of Portugal's most celebrated writers.

The history of drinking is told through 1,800 cups, chalices, and glasses at this exhibit.

These rock drawings in the Côa Valley also create an ancient optical illusion.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

Europe's oldest still-operational tea farm also boasts a spectacular view.

One man's remarkable private collection of art from around the world.

You can cross from one country to another in a single hop on this little bridge.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

This downtown Dallas art installation is always on the lookout.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An abandoned anti-smuggling station decays along the boundary between Portugal and Spain.