It's called the St. Thomas More House of Prayer. It's owned and run by lay people whose mission is to make the Divine Office better known. The full Liturgy of the Hours is prayed there by members of the local community. Guests may come as individuals wishing for a few days (or just a few hours) of prayer and quiet, or in organized groups with their own retreat master. The House of Prayer also sponsors several retreats per year. All guests are expected to participate in the liturgical hours while they are on the premises. Volunteers will answer questions and help guests who are new to the Liturgy of the Hours.
See their website for more information. This place is absolutely beautiful.