This public pool is one of the last remaining lidos of the countless built in the 1930's as public works projects in the United Kingdom.

This peaceful park saw the beginning of an extraterrestrial invasion in H.G. Wells's 'The War of the Worlds.'

Amazing collection of folly buildings in Cobham, Surrey.

The world's first purpose-built motor racetrack was destroyed by the outbreak of two world wars.

The world's largest reflecting pool is just two centimeters deep.

A young Gustave Eiffel assisted in the construction of this skinny metal observation tower.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

See what remains of a once grand ancient Roman circus.

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

A Nesting Doll of Churches.

The underground sanctuary of a mysterious ancient cult.

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

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

This ancient market is often referred to as the oldest shopping mall in the world.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

This basilica is dedicated to two saints, one of which is known more for his famous quote.

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

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

Breathtaking and huge 430 year old maps of Italy.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.