Short but important

The summit of Mt. Monadnock, in Jaffrey, N.H., one of the world’s most climbed mountains and beloved by New England writers.

It’s only 3,166 feet high but dominates its region of southern New Hampshire. It gave the term “Monadnock’’ to geologists to describe any isolated mountain formed from the exposure of a harder rock from the erosion of a softer one once surrounding it (a landform termed “inselberg" (“island-peak") elsewhere in the world).

— Photo by LegalSmeagolian