Where George Lemaître discovered the expanding nature of the universe.

This 19th-century zoological collection has withstood the test of time.

A multi-story, retro videogame time capsule in the Netherlands.

A monumental toilet that is also host to rare plants.

Though they might seem like arbitrary scratches in the wall, these were once official measures of length.

An installation that makes understanding the size of the universe a walk in the park.

Above the door of a house, a plaque claims to commemorate the future living place of the inventor of time travel.

This former cigarette factory was built in a style inspired by Islamic architecture.

A 30-foot-high stream of chocolate flows continuously at the Lindt Home of Chocolate.

A sculpture of a woman so beautiful she got arrested for it.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

A helicopter memorial commemorating what was once the only way to access this West Berlin exclave.

The oldest skyscraper of Europe now stands dwarfed by the surrounding structures.

A unique look into the bowels of a century-old funicular.

A scientific observatory managed the largest Portuguese astronomy research unit.

A journey through every aspect of the human body.

A gathering of green robots at the Googleplex.

Perhaps the world's cheapest vending machines.

A pair of oily black spiders lurk inside South Korea's largest airport.

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

The home of president Truman during the Potsdam Conference, and the place from which the atomic bomb strike on Japan was triggered.

This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

A treasure trove of scientific instruments from the 17th and 18th centuries.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.