This tiny chapel withstood a massive mudslide and flash flood.

A twisted steel beam from the wreckage of the World Trade Center is the centerpiece of this memorial for those who died on September 11, 2001.

Inside the small garden of two mid-century apartment buildings stands a centuries-old bell tower, separated from its original church and hidden from view.

The largest Canadian war cemetery in Italy commemorates those who died in one of the bloodiest battles of the Italian campaign during World War II.

A completely underground tour following the path of the most precious element: water.

One of the best-preserved modern fortresses was part of a pivotal moment in the Italian Risorgimento.

During World War II, the Shroud of Turin was secreted to this remote southern Italian complex.

Packed with geological formations, an ancient river, and taxidermied seals, this overlooked coastal cave system is worth a spelunk.

A holy stone inside this spectacular hermitage is said to have healing properties.

Built as a defensive structure, this medieval walkway road offers a unique view of the village of Brisighella.

This hermitage spanning an Italian river gorge draws pilgrims hoping to heal ailments like arthritis and migraines.

The first passenger cable car in the world.

It's believed that these columns marked the end of the Via Appia.

The hilltop ruins of a border fortification in the Italian Alps that was much fought over.

Two bronze wolves atop this large rock honor the "Wolves of Tuscany" brigade of World War I.

A medieval castle was used for centuries as a hemp farm.

This war memorial holds the remains of around 20,000 World War I soldiers from both sides of the conflict.

This site marks the oldest known settlement in Campania, inhabited around 9,000 years ago.

A medieval tower with a suspended iron cage used as an open-air jail for criminals who were exposed as a warning.

At this medieval church, Thomas Beckett was cantonized as a martyr.

In Majella National Park, these stone dwellings harken back to the region's pastoral history.

This ancient city was home to one of the greatest schools of Greek philosophy.

An omelette made with over 1,000 eggs may have been prepared when Holy Roman Emperor Charles V visited this monastery.

One of the largest squares in Europe contains an entire artificial island.