From "Masada: Literary Tradition, Archaeological Remains, and the Credibility of Josephus" by Shaye Cohen Journal of Jewish Studies: Essays in honour of Yigael Yadin Vol. XXXIII, pp. 385-405 ...

While in the area, you must visit Masada, which sits about 60 miles south ... this archaeological site houses the remains of a Sicarii settlement. The Sicarri was a group of Jewish radicals ...