Nature and beauty amidst pollution and industrial wreckage.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

Perhaps the most scandalous statue of America's first president.

See one of the earliest depictions of a Christian ceremony – with a woman at the center!

The eyes and ears of this tower keep watch over Malta’s Grand Harbor.

Valletta’s outdoor theatre stands within the ruins of a 19th-century opera house.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

This unique building in the main square stands out among the city's typically Baroque architecture.

A square-domed symbol of resilience in the heart of the old Jewish Ghetto.

Inventive Sicilian specialties are executed with flair at this restaurant overseen by chef Ciccio Sultano.

A small cell adjacent to this church was once the bedroom for a renowned saint.

Italian horror legend Dario Argento’s own shop hides a sinister museum-dungeon in the basement.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

This is the oldest Roman-made bridge in the city still existing in its original state.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

This curious, round temple is the oldest still-standing marble building in Rome.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A forgotten "city of water" underneath the famous Trevi district.

A Nesting Doll of Churches.