Stationed inside the Debsconeag Lakes Wilderness Area, just south of Baxter State Park, the ice caves were created by glaciers during the Ice Age and now we humans can climb inside and pretend to hunt for bones and monsters.
Rappel down 100-foot Ripley Falls in Crawford Notch in New Hampshire's White Mountains, even if you've never rappelled down anything before. Waterfall rappelling is exciting and thrilling and kinda scary at first - but mostly it's just cool.
Do yoga in the grass next to Lulu's Barn & Alpacas
on Westport Island, where you can relax into savasana, gaze up at the canopy of trees framing the sky overhead, and listen to alpacas pulling up grass and munching away contentedly. It's a wonderful sound.
During a sunset or full moon canoe tour on the Scarborough Marsh, you'll get a sunset (and maybe a moon rise) on the water, in a canoe, at a place that's supremely scenic and filled with all sorts of marsh wildlife, with a knowledgeable guide who can name all the birds and the fish and even point out some planets in the night sky.