Art historians have debated the identity of this medieval stone rider since the 19th century.

Ancient ruins hidden underneath a modern luxury hotel.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

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.

Feast on cuttlefish ink-stained paella by the beach.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

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

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered cave.

Neo-cave art on the macro scale.

Prehistoric history as seen through the lens of an outsider artist.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.