How did the fortress of solitude arrive on Earth? Wasn't Superman the first Kryptonion, therefore no other Kryptonion could've built it? - Quora
![Lex Luthor inside supergirl's Fortress of solitude closing scene /Supergirl season 5 episode 17 - YouTube Lex Luthor inside supergirl's Fortress of solitude closing scene /Supergirl season 5 episode 17 - YouTube](https://i.ytimg.com/vi/OZ0giNxS_c4/mqdefault.jpg)
Lex Luthor inside supergirl's Fortress of solitude closing scene /Supergirl season 5 episode 17 - YouTube
![What is in the Fortress of Solitude? No fan art please. I'm looking for specifically named technology, artifacts, confiscated weapons, and animals. I added a pic of the Eye of Thundera to What is in the Fortress of Solitude? No fan art please. I'm looking for specifically named technology, artifacts, confiscated weapons, and animals. I added a pic of the Eye of Thundera to](https://preview.redd.it/chxn9lyp79x51.jpg?width=1600&format=pjpg&auto=webp&s=8c103486bfce69a2d97d23209ae1ba856efbb1f3)