The most ancient is the urban monastery of St. Gregory the Great in the heart of Rome, just a block from the Coliseum. This monastery of the Pope who helped evangelize the English at the beginning of the seventh century came to the Camaldolese centuries ago and is a contemplative center in Rome. The American Camaldolese have an urban monastery in Berkeley, CA, which also serves as their house of studies. Located a bit above the city, surrounded by trees, it commands a view of the city and bay underneath. All these communities have retreat facilities for men and women and provide private silent, or directed, or occasionally preached, retreats.
Retreats are one of the major ministries of the Camaldolese order.
The American Camaldolese have an active oblate community including members of the Episcopal Church and other denominations. Polite inquiries and comments will always get an answer. My thanks to Fr. St. Peter Orseolo was doge of Venice until he met Romuald and was converted. He followed him into the eremetical life and remained in that life thereafter.