This unique sculpture is often overlooked by pedestrians.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The last remaining predreadnought battleship in the world has been a museum for nearly a century.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

These lamps were created to expel sewer gases after an event known as The Great Stink.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

It's gunky, it's gross, and it's been freed from the sewer and put on display.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

On the outskirts of the small village, an abandoned grassy field glitters thanks to the white stones of an ancient structure.

This snack factory boasts several tributes to its popular line of rice crackers, including a quasi-shrine.

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

It's always game time at Stockholm's only museum devoted solely to video games.

A bronze tribute to the wildly popular video game from the '90s.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

Transport yourself to the 1980s era of video games at this themed restaurant and bar.

This riverfront statue honors the inventor of the first video games ever sold.