Nestled among cedars, evergreens, and sword ferns, and, with views of Mt. Rainier in the distance, the secluded Cedar Creek Treehouse sleeps four, and has a giant cedar growing through its kitchen. To get to it, be prepared to climb 77 zigzagging stairs and cross an 80-foot suspension bridge. Ashford, Wash.; 360/569-2991; www.cedarcreektreehouse.com; doubles from $250, $25 each additional person; children must be 10 or older.
Spending the night in one of the three screened-in huts at the rustic Tree Houses of Hana, on Maui in Hawaii, just barely qualifies as roughing it: tiki torches and candlelight replace electricity, and a bamboo outhouse below has hot running water. Your perch in an African tulip or Kukui tree overlooks a five-acre flower farm and, beyond that, the ocean. Hana, Maui; www.treehousesofhawaii.com; 808/248-7241; doubles from $125.
No climbing required: Missouri's Treehouse Cabin is a lofty little house on the banks of the White River in the Ozarks. A second cabin, the Treetop Hideway, with a double-whirlpool bathtub, opens in mid-April on the 120-acre property. The area is ideal for hiking, swimming, and trout fishing—and at the end of the day, you can grill your catch on your private deck. Dora, Missouri; 417/261-7777; www.riveroflifefarm.com/lodging/tree-house.html; $165 for two, $25 each additional person over 12; $10 each additional child under 12.
On Puerto Rico's western coast—one of the world's best surf spots—the sprawling Tropical Treehouse holds up to eight (in three double beds, two single beds). Its design is a tribute to the versatility of bamboo: the grass is put to use as walls, beds, and floor lamps. The beach is a five-minute drive, if you can tear yourself from one of the hammocks with amazing views of the sea. Rincon; 541/482-6357; www.tropical-treehouse.com; tree house for four $200; $10 each additional person.