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

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

The burial place of 14 of the executed leaders of the Easter Rising.

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

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

A 18th century graveyard and its astonishing cortege of macabre iconography.

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

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Where once there was a train station bathroom, there is now this German burger joint.

The last Victorian market in Belfast.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

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

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

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

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

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

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

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

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