Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

A popular Icelandic children's story comes to life inside this cave.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

Remnants of the United States's largest accidental oil spill still mar a California valley.

Hidden inside a gift shop that doubles as a museum, this gargantuan yo-yo can only be operated by crane.

This cave was the former seat of power for two brothers who ruled together as kings.

This ancient oak tree sheltered accused "witches" in the 17th century.

These museum grounds are a Dalai Lama-declared peace oasis.

The plants form a living library and laboratory for researchers and students at Michigan State University.

A train station decorated by a giant replica of an ancient Shakōki-dogū figurine.

Love is in the air along the small street in Brooklyn.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

The grandiose interior of this bar speaks to its past as home to famous jewelers and railway offices.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

Turntable anonymously received orphans, alms, and groceries.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

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

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

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

The underground mall's skylights look like they could be part of a spaceship.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

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