Open-air amphitheaters are large, outdoor venues designed for performances, concerts, and events. They typically feature a circular or oval shape, allowing audiences to enjoy unobstructed views of the stage. The seating is often arranged in tiers, which helps enhance acoustics and visibility. These structures have been used since ancient times, with famous examples like the Colosseum in Rome and the Theater of Epidaurus in Greece. These amphitheaters are popular for hosting a variety of events, including music festivals, theater productions, and community gatherings. Their open design allows for natural light and fresh air, creating a unique atmosphere for both performers and audiences. Many modern amphitheaters also incorporate advanced sound and lighting technology to enhance the experience.