Harlem Fire Watchtower built in 1857 is a an amazing spot, high on a rocky outcrop in Marcus Garvey Park in Central Harlem. The bell hanging in it used to ring alarms in coded sequences to send out horse-drawn fire trucks to blazes in the neighborhood. It is the only cast-iron one left of its type and is landmarked. You can see for a couple miles in every direction: to the west are Riverside Church and the Cathedral of St. John the Divine, the the East is the Triboro Bridge and East and Harlem Rivers, looking South you spy the Empire State Building, past the vast expanse of Central Park. A great part of a visit to the surrounding historic district of Mount Morris Park where composer Richard Rodgers grew up, and jazz greats played at Lenox Lounge and Minton's not far away.