Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A 16th-century horror show built in a lovely Italian garden.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Wonderland replication in progress by one persistent man.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Mountain where Jesus was first tempted by the Devil.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

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

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.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

A quirky and charming restaurant founded by artists.