Lakeside Antiques in Manchester has some weird stuff. There's a booth on the far side of the ground floor where I got a giant preserves scorpion in a frame. Make sure you poke around upstairs as well. Think they are only open Wed-Sun, or something like that.

Twin Bridges Market in Leeds has a fake skeleton dressed in funky clothes, with a sign that says "Free hugs." I may have hugged the skeleton at least once. It's on the way to the river portage, which has an old cemetery and fantastic views of the Androscoggin River rapids. Free walking trails around the island.

So I'd visit Lakeside Antiques, then drive to Leeds, get a sub at Twin Bridges, hug the skeleton, and have a picnic at the river portage.