Ancient sources have identified several buildings which were included in the Lyceum complex. An Apodyterion (dressing room), mentioned in Plato’s dialog Euthydemus; Dromoi and Peripatoi (tracks for foot and horse races); the Gymnasium; the Palaistra, also mentioned in Euthydemus; sanctuaries to Apollo; seating for judges and spectators; and a pair of Stoa.
Parts of the Lyceum were wooded and river channels were dug to irrigate the vegetation growing there. According to Theophrastus, one large tree had surface roots spanning 33 cubits.