Backyard Treehouse It’s our new addition to the Treehouse Series, designed specifically for smaller yards.  It still accommodates all the popular options available for 5’ high decks. Adventure Treehouse The fort that started it all, Backyard Adventures’ most popular base structure, with a 5’ high deck. Options are unlimited: add a 4’ sundeck , 7’ tower, your choice of slides, and much more.     Olympian Treehouse This is our own favorite, with a 6’ high deck that provides extra headroom for ground-level play, such as a Lower Level Conversion or Playhouse Package. For many families, this is an ideal starting point in the selection of their Backyard Adventures play set. Titan Treehouse Thinking bigger? Higher? That’s the Titan, with a 7’ high main deck and 6’ high Sundeck. It accommodates a 14’ Rocket Slide, 7’ Rock Wall and every other option you could want.