This underground room has been uncovered in 1997. It consists of two chambers and their ceiling archs are still clearly visible.
More information on Toledo's official website http://www.toledo-turismo.com/en/the-well-of-el-salvador_140
Address 6 Calle de Santo Tomé, Toledo 45002, Spain
Coordinates 39°51'24.476" N -4°1'37.196" E