Zedekiah's Cave — also called Solomon's Quarries — is a 5-acre underground meleke limestone quarry that runs the length of five city blocks under the Muslim Quarter of the Old City of Jerusalem. It was carved over a period of several thousand years and is a remnant of the largest quarry in Jerusalem, stretching from Jeremiah's Grotto and the Garden Tomb to the walls of the Old City. The cave has great historical importance in Freemasonry.
The 'cave' is open to the public Sunday through Thursday for a small admission fee and there are guided tours.
Wikipedia https://en.wikipedia.org/wiki/Zedekiah's_Cave
Address Jerusalem, Palestinian Territories
Coordinates 31°46'56.113" N 35°13'51.678" E