Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This Italian church is as beautiful as it is common, except for the real skulls decorating the many mannequins inside.

A diverse collection of wax, bone, papier-maché and mummified relics.

The secret medieval communication system will whisk your words above the noise of the crowd.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

The last four extravagant street signs of London's historic banking street.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

An unusual round church in London with a Templar past.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Manchester's abandoned train depot lingers in a post-industrial purgatory.

World's largest working waterwheel has been around for over 150 years.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

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