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

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

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

An ancient neolithic tomb that only sees the sun twice a year.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

The highest peak in Northern Ireland is topped with a stone tower and haunting burial mounds.

The inscribed stone at Kilnasaggart is a remnant from nearly a millennium ago.

The remains of diamond fever taken over by the desert.

Scary metal statues adorn some of the signature buildings of Burlington, VT.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

An artist sees trees as a medium for sculpture.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

Haven for steampunks.

A posh members-only club with a literally dramatic history.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Plot your trip through the city on the sidewalk.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Prove you deserve to be fed by Kenny Shopsin.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.