Scattered throughout London are ancient remnants of the city's former bounding wall.

Famously misunderstood wonder of the ancient world

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Breathtaking and huge 430 year old maps of Italy.

Christ's blood preserved in a Belgian town.

Commemorating the spot where the famous scientist fed his pigeons.

Go inside to really appreciate this 500-year-old technological masterpiece.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A small statue of child Jesus given by Magellan in 1521

London's old-school healing garden.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

This was once the center of the Birdman cult, and is now a World Heritage Site.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

The famous winding walk at Chartres is surrounded in mystery and myth.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.