Thousands of coffin-like pillars make up this controversial Holocaust memorial.

An ancient octagonal weather station named for the eight Greek gods of wind.

The tallest residential building in Africa is an unsettling Brutalist monolith.

An antiquated German apothecary on Chicago's North Side.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Scattered throughout London are ancient remnants of the city's former bounding wall.

London's smallest police station is barely the size of a phone booth.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

An unusual round church in London with a Templar past.

Amsterdam's former hotspot for public executions and dissections.

Amsterdam's Red Light District leaves little to the imagination.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The ruined doorway is a portal to the building's turbulent and torturous past.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A mocking tribute to the past and modern leadership of Prague.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

The liveliest ghost town in the state.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.