A quirky natural history museum built from the collection of an early 20th century doctor, the Libby Museum (Rte. 109, 603/569-1035, www.wolfeboronh.us/Libby  Museum, 10 a.m.–4 p.m. Tues.–Sat. and noon–4 p.m. Sun. June–mid-Sept., $2 adults, $1 children 6–12, free children under 6) has a fascinating rainy-day collection of stuffed animals and Native American artifacts.
The little town of Madison is home to the Madison Boulder, the largest glacial erratic in New England, which was washed from more than 12 miles away by a huge flow of glacial meltwater. Made of superheated feldspar and quartz, the hulking giant is 83 feet long, 23 feet high, and 37 feet wide, and weighs in at more than 5,000 tons (that’s 10 million pounds, folks). The boulder, which has been designated a National Historic Site, is located in a state park on the north end of town (Rte. 113, Madison, 603/823-7722, ext. 757, www.nhstateparks.org ).