The asklepion was the place were ill people went in the hope of being cured. To find out the right cure for their ailments, they spent a night in the enkoimitiria, a big sleeping hall. In their dreams, the god himself would advise them what they had to do to regain their health. There are also mineral springs in the vicinity which may have been used in healing.
The theater was designed by Polykleitos the Younger in the 4th century BC. The original 34 rows were extended in Roman times by another 21 rows. As is usual for Greek theaters (and as opposed to Roman ones), the view on a lush landscape behind the skene is an integral part of the theater itself and is not to be obscured.