On the higher terraces, we come to the first Nymphaion. This is the name given to subterranean chambers cut into natural caves. There is some evidence suggesting that the first Nymphaion was associated with water. The second Nymphaion is to the southwest of the first and consists of two cavern structures, which communicate with each other by way of subterranean tunnel. Finally, the third Nymphaion has recently been excavated on a lower terrace to the northeast and another came to light a few years ago. Large parts of these last Nymphaia are preserved in the basement of the houses built above them.

The Hellenistic Fortifications

Excavations in the area of the theatre have revealed a large number of ancient stone balls, which were used in the sieges, and remains have also been uncovered of the Hellenistic fortifications of ancient Rhodes, which ran along the coast as far as the northernmost point of the island and the town. Remains of the fortifications have been preserved in the basements of the buildings alongside the streets and also on the east coast and on the west and south side of the town. Finally, remains of the fortifications, some of them still visible, have been uncovered on the acropolis, in the west, inaccessible part of the perimeter road.

Outside the Hellenistic fortifications, to the south, the area is occupied by the extensive ancient cemeteries of Rhodes, which are important from the point of view of both their architecture and their design. The cemeteries at Karakonero are quite accessible and can be seen from a distance.

More burial buildings or complexes and simpler graves, built or cut into the rock, were found during the Italian occupation and others still being revealed by earlier excavations, in a very wide area, that the Archeological service names Rhodian Necropolis.