If you think that honeymoon destinations only come in one flavor - plain vanilla - think again. Today's honeymooners have fabulously unique options. You and your new spouse can cuddle up in a tree house, celebrate on a remote island, enjoy the outdoors in a luxury setting or keep each other warm in an exceptional hotel that reinvents itself each winter. Here are four over-the-top resorts that will appeal to even the most adventurous couples.

Cayo Espanto
Belize, Central America
Fulfill your fantasies of being stranded on a tropical island with your husband. Just a seven minute boat ride from the east coast of Belize, your honeymoon dreams will come true on Cayo Espanto.This 3.5- acre mini-island is surrounded by shallow, serene, Caribbean waters, and accommodates just 14 guests on its sugar-white sands. Upon arrival, you and your mate are assigned a personal butler. Private villas each boast their own pool. Dine al fresco on your private dock and savor asumptuous dinner, tailored to your tastes. If almond crusted parrotfish fillet with blackened corn and plantain mash doesn't suit your tastes, then maybe the charred New York strip steak will do. Activities include kayaking and sailing in the calm surrounding waters, or take a trip to snorkel in the Western Hemisphere's largest barrier reef. (888-666-4282, www.aprivateisland.com, from $1195 per couple per night, includes meals and beverages)

Post Ranch Inn
Big Sur, California
You and your hubby can honeymoon in the heights of luxury in your very own upscale tree house. Perched 1,200 feet above the Pacific Ocean, the Post Ranch Inn was named Hotel of the Year 2004 by Small Luxury Hotels of the World. Honeymooners can savor in-room champagne and Osetra caviar as well as delicacies at the inn's Sierra Mar Restaurant, with gourmet California cuisine. Choose from seven individual tree houses, located nine feet above the ground on sturdy stilts, with staircases leading to your romantic hideaway. You won't be out on a limb in your house, which includes a cozy fireplace and plenty of windows to view your natural surroundings. Inn activities include Native American-inspired spa treatments, daily yoga and meditation classes, evening telescope gazing and guided walks through the redwood and oak forest. (800-527-2200, www.postranchinn.com, $745 per couple per night)

Ice Hotel
Quebec, Canada
For a really cool backdrop to your honeymoon, travel way north to the Ice Hotel.

Just a 30-minute drive from Quebec City, this extraordinary hotel is built entirely of ice and snow. Incorporating different architectural elements each year, this shimmering hotel gets rebuilt every January and closes each April, when the structure melts. The Grand Hall features an ice chandelier illuminated by fiber optics, and the hotel's Absolut bar offers chilled vodka served in glasses crafted entirely of ice. Dance the night away at the hotel's N'ice Club, then retire to your cozy room and cuddle up with your honey in a couple's Arctic sleeping bag on a foam mattress atop your ornately carved ice bed. Nearby activities include snowmobile rides, dog sledding, ice fishing and ecotours. (877-505-0423, www.icehotel-canada.com, from $199 Canadian per person, based on double occupancy)

The Resort at Paws Up
Greenough, Montana
If you can't choose between roughing it in the great outdoors or luxury accommodations, then go for both at Tent City at The Resort at Paws Up. The oversized luxury tents sit on 37,000 acres of pristine, private Montana wilderness, close to the Blackfoot River of "A River Runs Through It" film fame. You'll enjoy stunning outdoor vistas with sightings of wildlife including bald eagles, whitetail deer and a resident elk herd, without sacrificing modern amenities like electricity, heating and private toilets and showers. Luxuriate in your king size bed on sumptuous linen sheets, or relax on your private deck while your personal Camping Butler prepares gourmet meals for you. Activities include horseback riding, fly fishing, hiking, kayaking and more. (800-473- 0601, www.pawsup.com, $450 per couple per night. Packages available.)