A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The ruins of a church destroyed by both the Great Fire of London and the Blitz, now turned into a peaceful garden.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

This life-size monument honors the legacy of a famous literary feline.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

These oversized fruit sculptures honor the contributions of the Windrush generation.

An 18-panel Soviet mosaic showcasing the scientific advances made under socialism.

One of the largest objects salvaged from the famous sunken passenger ship.

Many mysteries surround these objects questioning whether they are cannonballs at all.

This medieval synagogue survived the Inquisition as a hospital and church.

This tribute to the fictional detective stands at the famous literary character's address.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

Museum dedicated to the terror regimes of Hungary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The world’s first statue of the late Apple co-founder.

A tribute to the builder(s) of Bitcoin.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

This building has survived for more than a century and remains virtually untouched.