5. Fort Tryon Park

Fort Tryon Park, designed by the Olmstead brothers, is another great place to discover Manhattan schist,  The Landmarks Preservation Commission writes that “36,000 cubic yards of gray Manhattan schist that were removed were employed in the construction of the architectural elements of the park.” Places in particular to look out for are the tunnel between the Henry Hudson Parkway and the Coisters, the base of the Cloisters, along with walkways that have provided opportunities for bouldering.