Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

Dramatic river bend surrounds a natural red-rocked pedestal.

Be(w)ar(e) the moat around this historic Czech castle.

A massive marble foot is tucked away in a small alley near the Pantheon.

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

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

A lover's walk between hilltop towns, decorated with graffiti love notes.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The bomb-ravaged remains of of a colossal Neptune.

Five candy-colored villages on the Italian Riviera.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

The largest known Ancient Egyptian obelisk.