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.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A beautifully eclectic mix of architectural styles.

The attic of a four-century-old canal house hides a clandestine church.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

The collection of intricate sculptures includes one carved from a mammoth's tusk

One of the world's richest men bought this former paper factory and transformed it into a mall.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

A series of abstract sculptures pop up from an otherworldly volcanic landscape.

This one-window stand has been home to a giant vat of slowly simmering meats and an array of unique tacos for almost 50 years.

By night, this auto repair shop turns into a taquería serving up some of the city's finest al pastor tacos.

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

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.