Pre-Heliaia Houses. Steps on North Side. Outer Foundation of Heliaia. Outer Foundation of Heliaia; South Side. Outer Foundation of Heliaia; Southeast Corner. Outer Foundation of Heliaia; West Side. Outer ... Κ-18 3402, 3403 ... Hydraulics; Poros Aqueduct ... Hydraulics; Early Geometric Well below South Wall ... Hydraulics; Draw Basin on West Side