The former home of Samuel Clemens and family remembers the happiest period of the author's life.

This large, circular tomb is the final resting place of the first emperor of Rome.

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

This chimerical bridge/tunnel appears to dead end right into the sea.

According to the legend, this structure was built in a single night with the help of the devil.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This famous archeological mystery may be an ancient example of movable type.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This historic floating crane became an unlikely symbol of the port of Trieste.

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

The Adriatic's most famous wind can be reliably experienced in the city's Marina.

One of the tallest lighthouses in the world also serves as a monument to the fallen of World War I.

A dead saint, a deadly poison, and a mysterious holy ooze.

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.

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

Breathtaking and huge 430 year old maps of Italy.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Home to the deepest rift anywhere on Earth.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

An architect's childhood fantasy treehouse made real.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.