A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

These 2000 year old remains of a Roman aqueduct are hidden inside a hotel lobby.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Remnants from a time before electricity.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Learn the fine art of making a centuries-old treat at this hands-on food museum.

Various sculptures are a rotating exhibit in this small town.

Mysterious tombstones thought to be remnants of Atlantis.

At an estimated 3,800 years old, this olive tree is one of the oldest on earth.

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

This museum is dedicated to the most famous Irish writers in history.

A former fortified tower now houses a collection of classic communications equipment.

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

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

One of Ireland's most infamous prisons for rebels including men, women and children.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.