If you feel like a drive: Art OMI in Hudson Valley remains open to the public. The field house/ gallery and gift shop are closed, but the outdoor sculpture and architecture park is open.

I went for an hour last weekend and it was crowded, but easy to keep a 20' distance from everyone and still enjoy the art. They ask that you wear a mask in the parking lot.

Details here:

https://www.artomi.org/visit