Here are a few gems:

The Pools of Bethesda.

The Herodian road directly outside the second temple that

Jesus would have certainly walked upon.

The Pool of Siloam (and Gracie).

Hezekiah's Tunnel

Remains of the Jebusite wall that stood previous to David's capture of the city.

An ancient potty.

The stepped stone structure that more than likely held up the larger public buildings at the north end of the eastern hill. Also, Babylonian arrows and a significant burning layer were found that probably coincide with the destruction of Jerusalem in 586 BCE.

Part of Hezekiah's outer fortifications against the Assyrian Army under Sennacherib.

The Western Wall (Wailing Wall)