Salute the leader of the proletariat.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

Plot your trip through the city on the sidewalk.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

A hidden "place of interment for gentlemen."

The modern birthplace of Irish freedom.

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

A hugely vast Irish landscape of barren rock that stretches for miles.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

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

A grave marker depicting a body snatching tableau on a 19th-century tombstone.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

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

An underground city of salt.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A fearsome dragon clings to a corner of Munich's city hall.