World's largest bell sits on the grounds of the Kremlin in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

Russia's own leaning tower was built on a tragic historical fable.

Replica of mosque destroyed by Russia in the 16th century.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

One of England's most famous churches hides a pair of little known architectural treasures.

This skewed English house has looked like it's going to fall over for centuries.

East London art gallery showcasing contemporary art from Europe's Eastern Bloc.

A celebrated bandstand at the center of what was once the worst slum in London.

A building that survived WWII, possibly on the virtue of its name alone.

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

The London statue that imitates passersby.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

A museum wholly devoted to juvenescence.

This luxury shopping lane has been protected by its own tiny police force for over a century.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

Ship-sized kinetic sculptural fantasy.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.