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

Venice's "Island of the Mad."

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A beautifully eclectic mix of architectural styles.

Famously misunderstood wonder of the ancient world

This massive chalk hill carving is one of England's most beloved giant horse geoglyphs.

Giant naked man on a hillside.

This ancient bridge made of stone slabs is said to be reserved for the devil to sunbathe.

The metal frame is all that's left of a wicker sculpture which once towered over the M5 motorway.