North Caldwell, United States of America
The Hilltop Reservation is a nature preserve located in Essex County, New Jersey, in the host communities of Caldwell, Cedar Grove, North Caldwell and Verona. It has over 200 acres (0.81 km2), and is the most recent addition to the Essex County Park System. It is composed of lands formerly occupied
by the Essex Mountain Sanatorium, a hospital center originally constructed in the early 1900s to treat tuberculosis patients. Hilltop Reservation is located on the Second Watchung Mountain, one of three Watchung Mountains which are long, low ridges of volcanic origin in northern New Jersey.
Listen to the audio guide for Hilltop Reservation Free on WIP — starts by itself when you arrive, even with the screen off