With its rusticated glamour and strangely artificial natural setting, the enclave known hyperbolically as “backcountry” Connecticut—home to collector Peter Brant’s elegant, capacious apple barn–turned–quasi-public kunsthalle—proves a surprisingly sympathetic setting for the riotous dazzle and decay of David Altmejd’s work. Set between an impossibly green polo pitch and a quiet stretch of road whose posh tranquility is disturbed only by the occasional lawn-service truck, the 9,800-square-foot space has been transformed by the artist into a series of ecosystems showcasing the various