This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.