This 27- deep well is a majes­tic site that peo­ple dubbed to be an invert­ed tow­er. Locat­ed in an estate in Sin­tra, Por­tu­gal. The estate is with­out a doubt as beau­ti­ful out­side as it is inside. This mys­te­ri­ous spot leave trav­ellers won­der­ing if it’s real­ly a well or an invert­ed tow­er.