The sunlight passing through the opening of this huge cave system creates a magical effect.

Packed with geological formations, an ancient river, and taxidermied seals, this overlooked coastal cave system is worth a spelunk.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Designed by Gustave Eiffel before his famed tower.

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

An early 20th-century bullring converted into a modern shopping center.

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

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

This unconventional used book store was once in the news for the surprising act of burning books.

Macabre astrological automaton clock dating to the late 1400s.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The world's largest wooden structure.