One of the world's smallest prisons boasts just two small cells.

An 800-year-old island castle in Guernsey's main harbor.

The initials "GW" mark where one of Scotland's most important Protestant martyrs was burned at the stake.

A site of pagan worship which still attracts people looking for fairies.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

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

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

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

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

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

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A colorful street named for the legendary Australian rock band.

Referred to as "the crappiest fountain ever," this sculpture has been splashing unknowing passersby since 1969.

A serene, almost spiritual place to do one's business. Who knew a public toilet could inspire and awe?

A tower made from shell rock designed to commemorate fallen soldiers in World War I.

Large World War II gun emplacements and tunnel systems remain hidden near a remote end of Waiheke Island.

Eat your Big Mac in a DC-3.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

This massive library holds what was once the largest book collection in the world.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.