31°22′51.37″N 35°21′51.65″E / 31.3809361°N 35.3643472°E
Nahal Mishmar (Hebrew: נחל משמר, lit. 'Guard Stream') or Wadi Mahras (Arabic: مَحْرَس) is a small seasonal stream in the Judean Desert in Israel. A hoard of rare Chalcolithic artifacts, the Nahal Mishmar hoard, was discovered in a cave near the stream bed which was dubbed the "Treasure Cave".
The Nahal Mishmar hoard (also called the "Cave of the Treasure hoard") is the hoard of archaeological artifacts found by a 1961 expedition led by Pessah Bar-Adon in a cave by Nahal Mishmar in the Judaean Desert near the Dead Sea, Israel. The collection wrapped in a straw mat found under debris in a natural crevice contained 442 objects: 429 of copper, six of hematite, one of stone, five of hippopotamus ivory, and one of elephant ivory. Carbon-14 dating of the mat suggests the date at least 3,500 BCE, i.e., it places the hoard into the Chalcolithic period.