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.