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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Fortified medieval tower house with lovely roof garden.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

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

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

This attraction is devoted to the wonders of steam power and features a replica of one of its most public disasters.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Drink wine handed out through a window as part of an age-old tradition.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.