In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

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

Third time's a charm, or in this case, two testicles are.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

This small Milan street is filled with colorful homes and a rich history.

Da Vinci's equestrian statue, 500 years in the making.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

Europe’s oldest natural human mummy.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Constructed from recycled wrought iron railroad tracks, it's been described as the most beautiful seaside pier in England.

An amazing collection of curiosities hidden in a small Welsh village.

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

This 19th-century pub features stained-glass windows celebrating Victorian-era "champions."

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.