cachette

plural cachettes

1. A hidden nook; a hiding place.

   The dwarf plucked the bird from its cachette, throttled it with a twist of his knotty hands, and held it up for the gunman to admire.

   1982, TC Boyle, Water Music, Penguin, published 2006, page 49

   1 more example

   A further twenty-six well-preserved statues were discovered in 1989 where they had been buried in a cachette under the floor of the temple.

   2009, Charles Harrison, An Introduction to Art