A retreat center stands for withdrawal from noise to find stillness and perspective. Dream books read it as a call to rest, reflect and come back to yourself.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.