There are several museums with different Adirondack themes nearby:
The Adirondack Museum is the long-established museum in Blue Mountain Lake that covers the history of all things Adirondack. In 2017 they will begin opening a number of new exhibits.
The Adirondack Center Museum in Elizabethtown, is a history museum focused on Essex County.
The Wild Center, is a new Natural History Museum located in Tupper Lake. It has excellent exhibits for all ages. Look at their website for directions.
The Lake Placid Olympic Museum is nearby. It is a small place but it gets good reviews.