Howe Caverns
Howes Cave, NY · Mohawk Valley$$
The traditional tour at Howe Caverns, about 40 miles from Albany, goes 156 feet underground and includes a quarter-mile boat ride on the Lake of Venus. Lester Howe crossed that…

Photo: Nicole Mayone / CC BY-SA 2.0 · source
Main Beach in East Hampton, New York, has a pavilion where the Beach Hut on Main sells food, and the Maidstone Club is right next door. Summer parking at the village beaches is tightly restricted, and the easy way in is by bike or a drop-off.
Others worth the drive in New York.
Lakes & rivers