This supermarket offers shoppers a window into the past alongside their groceries.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Rome is now home to a stunning food museum and library.

Gods clash with machines in a power plant regenerated as a museum.

Ancient ruins hidden underneath a modern luxury hotel.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

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

One of seven Jewish catacombs in Rome and one of only two open to the public.

A forgotten "city of water" underneath the famous Trevi district.

A hospital where antique dolls are given new life.

The Pope’s secret escape route.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

The yawning maw of this pagan visage is said to bite off the hands of liars.

An alchemist's "magic door" stands in the middle of a Roman park.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

France's high-tech, future-themed amusement park.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.