An ancient theatre, about an hour’s drive north of Athens. It is made of marble and has absolutely amazing acoustics. In the 2nd picture the fellow in the red shirt at the bottom in the circular area was singing Italian opera arias! Just for fun. He had a great voice & we could hear every bell-like note!. The theatre was originally associated with religious events. Concerts are still given there on summer evenings.

The Theatre at the Asclepieion in Epidarus