It is right outside the Acropolis Metro Station on Makrigianni pedestrian Street. The spot is also the side entrance to the Acropolis Museum. Across the Crescendo Cafe
Acropolis Metro Station, Athens 117 42
https://maps.app.goo.gl/bQYmn8AScDvkXoPZ6
https://maps.app.goo.gl/yLxXGbwTysRLyU8WA