The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

A rather vulgar example of the transition from Latin to the Italian vernacular.

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

Dakar is home to one of the oldest African art institutions in West Africa.

The tiny Spanish village that long refused to change its outrageously anti-Semitic name.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

This splendid mosaic embodies ancient Rome's fascination with the exotic allure of Egypt.

The city of Palestrina was built around this magnificent terraced sanctuary dedicated to the pagan goddess Fortuna.

The second-highest village in Lazio has attracted artists for 400 years and is now a spectacular open-air art gallery.

A lonesome Moai stands in a small Italian town some 9,000 miles away from its Easter Island brethren.

A magnificent Neogothic tomb hides within this Italian fairytale-like forest.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

This massive rock balanced for thousands of years being tossed here during a volcanic eruption.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

Italian director Pier Paolo Pasolini fell in love with this lonely 13th-century tower while making his most famous film.

The ruins of a medieval village that was abandoned after a 19th-century inferno.

An amazing collection of wax anatomical models and terratological models.