The Dana Discovery Center is at the northeast section of the park, on the shore of the Harlem Meer.[1][2][288] Nearby is Blockhouse No. 1, the oldest extant structure to be built in Central Park, which was erected as part of Fort Clinton during the War of 1812.[267][362][288] The Blockhouse is near McGowan's Pass, a set of rocky outcroppings that also contains Fort Fish and Nutter's Battery.[363] An ice-skating rink, Lasker Rink, is adjacent to the Harlem Meer, above the Loch near Fifth Avenue and 107th Street.[2][364] The park's only formal garden, the Conservatory Garden, is two blocks south.[2][365] The North Meadow Recreation Center, tennis courts, and the East Meadow, sit between the Loch to the north and the reservoir to the south.[2][366] The North Woods takes up the rest of the northern third of the park. The areas in the northern section of the park were developed later than the southern section, and are not as heavily used, so there are several unnamed features.[367]