For the arena, I was hoping we could do a nice place with hills and meadows with a bright blue sky. It also has a forest. But the arena is very deadly, and its hard to find streams.
Or we could do an arena where we're underground. We have to find underwater streams, shelter, food, everything. That arena might be too difficult though, seeing as there are really only bugs, bats, and lizards in caves.
Also, maybe a mountain range. It would require some stamina to climb and it would be hard to get away from the other tributes. There could be a secret tunnel system in the mountains and one mountain could actually be a volcano. I like this idea the best :3
Hope you like these ideas! :D