Cave 31 (2.45 × 2.70 m, height 1.4 m; Figs. 3, 4) was a natural cave which was enlarged by quarrying in order to convert it for use as a rock-shelter. The opening (1.00 × 1.95 m) faced southwest, and chisel marks on the rock indicate the opening had been made wider. Several stones that were probably debris from the ceiling or the walls were discovered on the bedrock floor of the cave.
Terrace Wall 3000 (length 21 m, width 0.8–1.0 m) was built of various-sized stones along a general east–west axis. Following the excavation of a stone heap near the southern face of W3000 (L32; Fig. 5), it became obvious that the wall was thickened with construction at that spot. The eastern side of W3000 was better preserved.
Wall 3007 (length 9.5 m, width 2.0–2.5 m) was built in a general north–south direction of different size stones.
Installation 35 (1.5 × 2.7 m, average height 0.68 m; Fig. 6) was constructed on a high bedrock outcrop, slightly southeast of W3007. The installation was a rectangular cell delimited on all sides by dry-constructed walls (W3004–W3007) built of large fieldstones. Terrace Wall 3007 delimited the installation on the northeastern. A single row of stones was all that was preserved of W3004 (length 2.8 m, width 1.5 m); however, it was probably wider originally. The heap of stones that was discovered on the bedrock southwest of the installation might have been part of this wide wall. Walls 3005 and 3006 were built directly on bedrock surfaces. No opening was discovered in the installation.