Hill-Stead Museum

A 1901 Colonial Revival mansion on 152 hilltop acres designed by pioneering female architect Theodate Pope Riddle, hung with Impressionist paintings by Monet, Degas, Manet, Whistler, and Cassatt; its circa-1920 Beatrix Farrand sunken garden hosts the summer-long Sunken Garden Poetry Festival. Open Wednesday-Sunday 10 a.m.-4 p.m.; grounds daily 7:30 a.m.-5:30 p.m.; adult admission $20.