Is this normal?

Hi, new calamity player here. I was looking for a red ballon and possible wings when I stumbled upon this? Is this normal or a glitch. It looks like it should be in the ice biome which is directly under the floating island. It will make for a nice sky island house though!

Hi, new calamity player here. I was looking for a red ballon and possible wings when I stumbled upon this? Is this normal or a glitch. It looks like it should be in the ice biome which is directly under the floating island. It will make for a nice sky island house though!