What is Fortress of Solitude?
The '''Fortress of Solitude''' is a fictional fortress appearing in American comic books published by DC Comics and is [[Superman]]'s [[Krypton]]ian base. The first Fortress was a huge [[iceberg]]. A huge golden [[key]] that only Superman or [[Supergirl]] could lift was needed to open the door. Superman built it. The second Fortress was a huge [[crystal]]line [[building]]. It looked similar to a pile of crystals and icebergs. A green crystal built the second Fortress. The third version was similar to the second one, but was bigger and looked different in the inside. This version was created by the [[Crystal of Knowledge]], a ring-like crystal. == In other media == The fortress of Solitude has been adapted to different forms of media, including movies, television series, and video games. {{Superman}} {{lit-stub}} {{DEFAULTSORT:Fortress of Solitude}} [[Category:Superman]] [[Category:Fictional buildings and structures]]