This lofty cottage, equipped with a bathroom, kitchen, and bedroom, is perfect for relaxing–not to mention stargazing. Guests can also climb a nearby spiral staircase to a glass–walled observation tower for 360–degree views of Mount Rainier. Call at least six months in advance for a reservation (from $300 per couple, $50 for each additional guest; cedarcreektreehouse.com).
KEY LARGO, FLORIDA JULES' UNDERSEA LODGE
Guests scuba dive 21 feet to the ocean floor to check into this hotel. Inside you'll get B&B amenities–hot showers, a stocked pantry, comfy beds–but with 42–inch windows to watch angelfish and barracuda swim by. The lodge sleeps up to six people. If you're not a certified diver, you'll be required to take Jules' scuba class to book a reservation (from $375 per person, including dinner and breakfast; jul.com).
FARMINGTON, NEW MEXICO KOKOPELLI'S CAVE
Carved into the side of a sandstone cliff, this hideaway's luxe touches include a waterfall–style shower and rustic fi replace. Guests making the 70–foot hike down to its door will see Ship Rock Mountain to the west and the San Juan Mountains to the north. The one–bedroom cave is open March through November (from $240 per couple; bbonline.com/nm/ kokopelli).