One of the most famous historical sites in Rhode Island is Fort Adams State Park in Newport. Established in 1965, the park preserves Fort Adams, a coastal fort built in 1799 and used until 1953. The fort was notably used during the War of 1812. Today, you can explore the fort and the grounds surrounding it.
https://www.destguides.com/united-states/rhode-island/landmarks-rhode-island