It could include spas, meditation, exercise, new friendships... Helping to get our lives back on track after caregiving. (It doesn't have to become a 'commercial' retreat, but rather a sincere, meaningful, healthy retreat for so many of us that face so much)
I tried getting away about 5 years ago that included such great things, but I couldn't relax for than a few minutes because I worrying about my parents who still lived in their single family home. If only they would have moved to that fantastic retirement village I had found for them, the worry wouldn't be so constant :(