For obvious reasons, lumberjack AVs are not permitted in Tree House Park. Everyone else is welcome. Each tree house has it's own theme, for example, there's the Tree House Of Time. Be sure to visit on the hour if you like chimes.
hop://fireandicegrid.net:8002/Xinashi/1740/1053/26 If you like chirps, visit the Bird House Tree House.
hop://fireandicegrid.net:8002/Xinashi/1707/982/26. If you like cars and/or bars, The Car Bar Tree House is for you.
hop://fireandicegrid.net:8002/Xinashi/1699/1014/38. If you are looking for something else entirely, visit the other Xinashi islands. Each also has it's own theme, be it wild, wacky or wonderful.