Where is the best place to go for a first ever trip?

I currently live in LA and have lived here for most of my life, also lived in San Diego for two years, and Austin Texas for three years but have never been anywhere other than those three cities and surrounding areas. I've been saving a lot of $$$ for a trip to take after I graduate high school, and this will probably be my only chance to go anywhere different because I can't afford to go to college and will have to get a job right out of high school, so I want to go somewhere that's different than what I have experienced before.