A com­plex of two dozen rock church­es, but only eight of them are acces­si­ble to the pub­lic. The church­es are carved into soft rock called tuff. Also on the ter­ri­to­ry of the muse­um is a mul­ti-storey rocky con­vent (now closed to the pub­lic). Tourists are espe­cial­ly attract­ed by well-pre­served col­or­ful fres­coes of the 11th-12th cen­turies.