The sublime strip along the hudson This alphabet and number guidebook celebrates Manhattan’s green oasis along the Hudson River. Riverside Park is roughly 330 diverse acres of beautiful parkland in an upper park along Riverside Drive and a lower park closer to the river. If you want to know where you are in the park, the photos are street-numbered. Markers, usually found on many lamp post bases, indicate the number streets. This book also features a gamethat adults can play with a child. Try counting the number of times a letter of the alphabet appears in the text. (The number can be found at the end of each photo’s description.) This can be especially challenging even for adults.