Greek theaters were large open-air structures built in ancient Greece for performances of tragedies and comedies. They were typically constructed on hillsides, allowing for natural acoustics and seating for thousands of spectators. The design included a circular performance area called the orchestra, a raised stage for actors, and tiered seating made of stone. The most famous Greek theater is the Theater of Epidaurus, known for its exceptional acoustics and well-preserved structure. These theaters played a crucial role in Greek culture, serving as venues for religious festivals and community gatherings, where stories of gods and heroes were brought to life through drama.