Curtis Connors' makeshift lab is the laboratory that former Oscorp Industries scientist Curt Connors created if ever his original lab was destroyed, or if he was fired from Oscorp (both of which happened). The lab is located in Manhattan's underground city and was featured in the video game The Amazing Spider-Man.
The lab homed the hero Spider-Man for a few hours to recover from the damage Doctor Alistaire Smythe did to him, causing him to actually be deceased for a few minutes. Within, he could access everything he could at Stan's apartment above ground. During the time of Spider-Man's recovery, his girlfriend, Gwen Stacy, stayed with him to be protected from the broken city above and to comfort her lover.