Lake Placid, in Florida, is the Caladium capital of the world !. Went there a couple of years ago and it was just stunning.
You can go on line and look at a huge variety to order from: www.happinessfarms.com
There are other places to order from as well. There are huge fields of caladiums - beautiful.
I love them - but I find that they do better in pots for me (just got to take pictures and remember where I planted them !).