Cabins, cottages, hotels…been there, done that. If you’re looking for a close-in, truly original getaway this summer, Airb&b has a couple of interesting treehouses ready for adult occupancy. In Burlingame there’s a 1-bedroom aerie in the middle of a forest with Bay view, just 20 minutes from the City. $275 a night. Way up on the astonishing scale is another treehouse, this one 2 miles from the beach in Aptos on 1.5 secluded acres with 3 bedrooms and 3 decks, full kitchen. $395 a night with a very committed 30 night minimum.