The monastery's setting is improbable enough to stop you mid-paddle when you first see it: a solid Romanesque church rising from a scrap of land in the middle of a lake that is itself in the middle of an island. The church of St. Mary dates from the 12th century, though the complex was expanded over several hundred years, and the blend of Romanesque stonework and later Baroque additions gives it a layered quality. The cloister courtyard is small but well-preserved. Inside the church, look for the carved stone details — the craftwork is finer than you might expect given how remote the location was when it was made.
The monastery is reached by small boat from either Mali Most, the little bridge between the two lakes, or from the dock at Soline. In summer, boats run regularly during park opening hours and are included in the national park entry fee. You can also paddle out on a kayak rented from Polače or Pomena if you prefer. The islet has a small café and limited outdoor seating — useful for a cold drink after the crossing, but the monastery itself is the reason to come. Allow an hour for the visit including the boat crossing, longer if the church is quiet enough to sit in for a while.