@Adam_James what kind of adventure are you looking for?! High elevation? Hiking/backpacking? Mountaineering? There are so many great options for adventure travel. We would definitely recommend looking at REI Adventure trips - lots of locations, wide variety of activities, awesome guides...each trip also has a recommended gear list, which will help regardless of who you travel with and where you go! Have fun!
At REI, we believe a life outdoors is a life well-lived.