Hibernacle

[Sarah]

That which serves for protection or shelter in winter; winterquarters; as, the hibernacle of an animal or a plant. Martyn.

[Sarah]

You’ve guessed it! It’s a place where you go to [hibernate]; somewhere to go in [winter] to get away from petty [annoyances], [destressify] and catch up on sleep. [Too good to be true]? Yeah, it probably is.

[Sarah]

noun, plural hibernacula [hahy-ber-nak-yuh-luh]

a protective case or covering, especially for winter, as of an animal or a plant bud.
winter quarters, as of a hibernating animal