The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

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

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

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

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

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

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

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

Stockholm's narrowest alley is barely over two feet wide.

A man has revenged his true love's betrayal through tears and stone genitalia.

This unique sculpture is often overlooked by pedestrians.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This wild explosion of color on a disused water tower tells the whimsical tale of a curious puffin.

Walk in the footsteps of the gods and straddle two tectonic plates.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

The most powerful waterfall in all of Europe.

Three million year old fossils are exposed for all to see on this Icelandic shore.

A real-life homage to the Rachel McAdams and Will Ferrell's fictional Eurovision musical duo.