Hercules CavesToledo (Toledo)GPS: 39.858699798583984, -4.0241899490356445
The legendary Toledo tradition attributes these caves to the Palace of Hercules, or the place where King Rodrigo opened a forbidden chest to discover the prophecy that augured the end of the Visigothic kingdom at the hands of Islam. Today we can see there the Roman cistern from the second half of the 1st century AD, and know the interesting engineering technique which it was built with.
We can also see the remains left by the Roman water tank, the Visigoth temple, the mosque, and the Romanesque church of San Gines from the 12th century, that took place over time on the caves
Callejón de San Ginés, 3