The cache container is a large Altiod can. You do not need to enter the museum to find this cache however it's well worth the money to go inside.
They have the full listing of firefighters that lost their lives on 9/11 along with over 90 restored pieces of vintage fire apparatus dating from 1725 to 1968.
The museum is air conditioned. You can enter the gift shop for free. While searching for this cache, please be discrete as not to draw attention to yourselves and the cache location.
Unir n frng.