Although the Jerusalem Temples have long been destroyed, some 49 underground cisterns and 42 channels beneath Temple Mount still exist. A new book by journalist and Temple Mount researcher Arnon Segal, “Habayit” (“The Home”), provides a near “virtual” visit to the cisterns.

https://www.israelhayom.com/2021/07/18/49-cisterns-tell-the-story-of-the-destruction-of-the-temple-and-much-more/