Many theaters I've seen in the ancient world, notable Greek and other Roman theaters, are much larger. This one holds only about 5000 occupants for modern concerts performed there. The acoustics are such that someone whispering onstage can be clearly heard in the last row. I didn't have the opportunity to see (or hear) a performance in this theater, but on visits to other ancient theaters I have been fortunate to have done so, and the feeling of being in such an old place gives one an eerie feeling of sharing such a performance not only with all the people who came before you, but with history itself! Its seaside location is almost totally unique in the ancient world. I can think only of the theater at Taormina, Italy as being similarly situated so near to the sea.