🇮🇹Rome, Colosseum, Italy

Interestingly, for the ship games, the arena of the Colosseum was specially flooded by 1 meter. Reconstructions of warships were installed in the arena, for the grand celebration of military victories. Water was supplied to the arena through special aqueducts.
https://goo.gl/maps/x8H7gdZC3XpsCCcU6