Site of James Cook's historic observations of the 1769 transit of Venus.

The ruins of a fairytale castle with a tumultuous history stand high atop the mountains.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

The castle where the Marquis de Sade lived out his darkest fantasies.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

Two graffiti towers stand like ghosts of Vancouver's World War II-era defensive outpost.

A single column facing the sea is all that's left of one of the most important temples of Magna Graecia.

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

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

You don't have to be a diplomat to visit the so-called Camp David of the West.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

A crumbling cliffside ruin hidden in the woods.

Myanmar's beautiful cemetery for Allied soldiers who perished during World War II.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

This crack in France's seaside cliffs once hid a sinister secret.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.