The Tropical Realm is a seperate world (similar to the nether and the end) from the original Minecraft and contains a lot of new content including pineapples, bamboo, and 3 new ores. To get there, you have to enjoy the sunset sitting in a beach chair drinking a Pina Colada. You will spawn in a pool of bubbling water. When you swim up, you will be in the Tropical Realm! To get back to the real world, simply go to the bottom of your spawn pool and wait.
A perfect place to retire and feel like you are in the carribeans. Dont forget the sunblock.
THE ONLY WAY BACK CURRENTLY IS TO USE SINGLE PLAYER COMMANDS