Friends of Princeton Open Space (FOPOS) is presenting a group show and sale of photographs taken at the Billy Johnson Mountain Lakes Nature Preserve and submitted to FOPOS’ annual Give Thanks for Nature Photo Contest, plus painterly photographs of botanical life at the Mountain Lakes Nature Preserve by Princeton photographer Frank Sauer. The exhibition is on view November 2 through December 4 at Small World Coffee, 14 Witherspoon Street. An opening reception is on Thursday, November 3 from 6-8 p.m.