A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This is the oldest Roman-made bridge in the city still existing in its original state.

Its interior is adorned with some of the best examples of early Christian mosaics.

The former home of an Italian artist is now a shrine to his ambitious works.

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

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Jesus' footprints and the first catacombs in the world.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

A remarkably intact castle that once was the largest in Ireland.

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

Experience what life was like in Ireland during the Viking and medieval ages.

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

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

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

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

This man-made mound monument was built out of soil from all across the Polish empire.

Real bones which are said to have belonged to a Polish dragon.