Spare 10gal tank

Swamp Junky

So &T, today I decided to trade my leopard gecko for two 10 gallon tanks. One will be turned into a realistic habitat thing for my hissing roaches, but I have no clue what to put in the other. I was thinking of making a realistic habitat for a tarantula but I don't have any that are big enough for a tank that size.

Any suggestions?

Jolt890

I would say a leopard gecko but...