Adjectives

(s)privy, secluded, secrethidden from general view or use“a privy place to rest and think”, “a secluded romantic spot”, “a secret garden”
(s)cloistered, reclusive, secluded, sequesteredproviding privacy or seclusion“the cloistered academic world of books”, “sat close together in the sequestered pergola”, “sitting under the reclusive calm of a shade tree”, “a secluded romantic spot”