Legend says this sacred tree was a gift from goddess Athena.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This 19th-century aqueduct provides insights into how water was supplied to Victoria on the island of Gozo before modern plumbing.

Despite the name, these small saltwater swimming pools have nothing to do with the Romans.

Ancient mysterious ruts carved in the bedrock.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

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

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

This massive monument has been telling the time for 150 years—at a slight angle.

A small plaque highlights the damage caused by German air raids during World War II.

The statue honors a beloved bird that once roamed St. George's Market.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

It is said a heartbroken man visited the gap every day to stare blankly out at the sea.

The last Victorian market in Belfast.