MORRIS, Conn. – Architect David Sellers feels certain there are folks out there willing to spend $1,950 to hunker down for a night in a cave.

Not just any cave, of course. This is a custom-built retreat made from enormous boulders. Windows shaped like eyes offer views of a vast meadow. A massive stone fireplace – so big it has a Jack-and-the-Beanstalk feel – looms at the foot of the king bed.

“People are going to see it,” Sellers said, “and think, ‘Oh my God, I’ve always wanted to get inside a giant rock pile.’”

Much is riding on that prediction.

The rock-pile hideaway is part of an unusual hotel that opened in January in the Litchfield Hills of western Connecticut, a 21/2-hour drive from New York. Winvian, funded and run by heirs to a Merrill Lynch fortune, is at once luxurious, whimsical, spooky, stunning and flat-out startling.

Eighteen cabins dot the forests and fields of the 113-acre resort. Each is different and utterly unexpected.

For $1,700 a night, you can reserve a barn-like cabin dominated by a meticulously restored 1968 Coast Guard helicopter. Watch TV in the chrome-and-steel fuselage or take a bath by the mock runway.

The Golf Cottage has banked walls and a green shag rug that varies in thickness so you can grab an antique putter and play the course that runs through the bedroom. The two-story Treehouse sits 35 feet off the ground and sways with the wind.

Or try sleeping in a bleak box in the woods inspired by Yale’s legendary secret society Skull and Bones – and yes, for $1,450 a night, it’s supposed to look like a tomb.

This playland for the wealthy is at the leading edge of an emerging trend: hotels that promise not just a getaway, but an experience.

The traditional retreats of the elite – resorts such as Twin Farms in Barnard, Vt., or Auberge du Soleil in California’s Napa Valley – have made their mark with an understated elegance: Their refined hush is the draw.

In recent years, however, some weekend travelers have begun to demand more of their hotels than fine linens and exquisite food. They’re looking for the same sense of novelty they find on African safaris or Costa Rican rain forest rambles.

“The new luxury is something experiential, something unique,” said Maria Shollenbarger, senior editor at Travel + Leisure Magazine.

Thus the success of Miami’s Delano Hotel. A night in one of the Delano’s starkly hip, all-white Modernist bungalows costs $3,200 – but the poolside cabanas are well-stocked with bronzing celebrities.

“People are looking for the wow factor, the bragging rights,” said Rick Swig, a hotel consultant and president of RSBA &Associates in San Francisco. “They want to come back from these places saying, ‘You won’t believe what I did this weekend.’”

Brad Garner, a vice president of Smith Travel Research, said he hears plenty of buzz in the industry about pumping up the novelty. “There’s a lot of brainstorming,” he said. “It’s a concept ready to be hatched.”

Here at Winvian, the wow factor was built into every suite, from the marimba-drum fence outside the Music Cottage to the painstakingly reconstructed stick-and-twig dam that hangs over the bed in the Beaver Lodge.

Some of the cottages have mainstream decor; the library suite, for instance, is all about warm wood, burnished leather and floor-to-ceiling books. But even in the more traditional cottages, there are no Laura Ashley floral prints or camp-cabin Adirondack chairs. The overall vibe is determinedly avant-garde – in a region that’s Norman Rockwell quaint.

“That’s part of the gamble,” said Sellers, who first sketched Winvian’s master plan.

Developer Win Smith Jr., the former chairman of Merrill Lynch, bought into Sellers’ eclectic vision after seeing him work magic at the Pitcher Inn, a family property in Warren, Vt. In the early 1990s, Sellers invited architects to transform the inn’s 11 suites so each told its own story. One room was redone to resemble an old country schoolhouse. Another became a duck blind, the curved ceiling painted the pale blue of a dawning sky.

“We figured if there are 5,000 people coming (to the area) every weekend to ski, there must be a dozen who will pay $500 a night for something really amazing,” Sellers said.

The Pitcher Inn has been a standout success, so when the Smiths were pondering what to do with a large tract of farmland the family owned in Connecticut, it seemed reasonable to try a similar concept – on a much grander scale.

Thrilled, Sellers invited 30 architects to Vermont for two days of brainstorming. The Smiths told the architects that each cottage must have room for a king-size bed, a luxurious bath and a desk. Their only other instruction: “Think outside the box,” said Maggie Smith, who has taken over Winvian since her recent divorce from Win Smith Jr. (Their daughter Heather is the resort’s managing director.)

A few of the proposals landed a bit too far outside the box.

Heather Smith rejected a circus cottage with a carousel as “too cute.”

Maggie Smith nixed the alien spaceship cabin, which would have been tilted on its side, with burn marks on the dirt and radiation hazard signs tacked to nearby trees. “Too far out there,” she said. “For now.”

Architect Malcolm Appleton tested the Smiths’ openness when he suggested converting a helicopter into a living room. “It was beyond my wildest dreams that they’d say OK,” he recalled. Appleton also designed a second cottage, an homage to the Mark Twain story “A Connecticut Yankee in King Arthur’s Court.” It’s furnished like a medieval castle, with heavy furniture in deep reds and purples and an immense four-poster bed.

He had to restrain himself from adding even more heraldic banners and armored knights to the cottage, mindful of the risk of slipping headlong into kitsch. “It would have been really easy to go overboard,” he said.

The Smiths won’t say how much they put into Winvian, but Sellers estimates that some of the cottages cost more than $500,000 to construct and furnish.

As part of the six-year development process, the Smiths also renovated the property’s original farmhouse, which dates from 1775. It features a cigar-and-brandy lounge, a game room with a vintage pool table and several eating nooks. (Nightly rates include three meals and open access to Winvian’s wine cellar.) An adjacent building offers space for wedding receptions and corporate functions; there’s also a 5,000-square-foot spa for guests. Large parties can rent the entire property for $32,000 a night.

Shollenbarger predicts that Winvian will ride high on the latest trend in elite travel.

“It’s experiential in the truest sense of the word,” she said. “It’s weird. There’s nothing else like it.” As long as the service and the food excel, she said, the rich and the curious are bound to flock to Winvian – “whether or not they think it’s fantastic to have a helicopter in their bedroom.”

Winvian

Address: 155 Alain White Road, Morris, CT Conn., 06763

Phone: 860-567-9600

Web: www.winvian.com

Prices range from $1,450 to $1,950 per night, double occupancy, including meals.