Overlook Ruins

Part of the original "Emerald Necklace" park plan this particular location was formed in the 1800s with the structural ruins serving as a field house. Today, a tunnel, a couple of walls, and a column with a small staircase that goes nowhere are all that remains. Hours for the park aren't listed but the visitor center in Back Bay Fens is open Monday through Friday from 9 AM to 5 PM.