[cafard]

In America, there are Catholic retreats, some at retreat centers, some at monasteries or convents, some elsewhere; I assume that other Christian denominations have retreats, but don't know and have never enquired.

For that matter, the writer Patrick Leigh Fermor, who was not Catholic, wrote about going to stay for a short period at the Benedictine abbey of St. Wandrille, mostly to get away from distractions. You can find the account in https://www.nyrb.com/products/a-time-to-keep-silence.