Information on the location
The Fortress of Solitude is Superman's base of operations in the DC Comics. This version of the Fortress of Solitude is located in the Arctic, though more recent versions of the Superman comics have placed the Fortress in other locations such as the Antarctic, the Andes, and the Amazon rain forest. The majority of the regular citizens in Superman's universe are either unaware or only vaguely aware of the existence of the Fortress, since its location is kept secret from all but Superman's closest friends and allies: Lois Lane, Batman, Wonder Woman, Green Lantern, Flash, Aquaman and Cyborg. A trademark of the Fortress is that it contains a memorial statue of Superman's Kryptonian parents holding a large globe of Krypton. Although Superman has living quarters at the Fortress, his main residence is still Clark Kent's apartment in Metropolis. The Arctic version of the Fortress of Solitude concept was first created for the pulp hero Doc Savage during the 1930s.
Appearance in the rap battle
This is the location where Superman rapped. Jimmy Olsen also made his cameo appearance here during Superman's first verse. After his second verse, Superman left the location and flew into the sky, followed by Goku.