For over 100 years, the Palisades Interstate Park has provided a haven for citizens of the New York metropolitan area. The park system was originally formed to prevent quarries from desecrating the majestic lower Palisades cliffs. Few of the founders could have envisioned the growth of the parks, as land purchases multiplied northward up the Hudson River Valley. Now with over 100,000 unspoiled acres, the parks offer myriad outdoor recreational activities and historic sites that attract more visitors than many major national parks.

For generations, boaters and train passengers have been mystified and intrigued by the sight of a castlelike structure looming in the Hudson River, near Fishkill. Bannerman Castle unveils the history of this site: an island arsenal, built to resemble a Scottish castle. The story begins in 1900, when Francis Bannerman VI purchased the island--officially Pollepel but later called Bannermans Island--for storing used military goods purchased from the government. A native of Scotland, Bannerman designed his arsenal to resemble a Scottish castle.