YelpCamp
If you're looking for a truly unique experience, head to Germany. Located in the German Alps, Waldseilgarten Höllschlucht allows you to try out tree camping, which means campers stay in tents that are hung from tree branches high up in the forest canopy. If you manage to get up there (by rope), you'll get incredible views of the Pfronten mountains by the Austrian border.
Submitted by krishnav