Located in Miami-Dade County, Florida, Key Biscayne National Park is a unique barrier island that has been shaped by its geological history and natural environment. With an average elevation of less than five feet above sea level, the island is characterized by its low-lying landscape and sandy beaches.

Historically, the island was an important access point for ocean-going vessels to Biscayne Bay, with the Cape Florida Channel and Bear Cut being the deepest natural channels into the bay. The island's unique shape, with a northern and southern end separated by tidal channels, has also made it an important stopover for migratory birds.

Geologically, Key Biscayne is not part of the Florida Keys, but rather a barrier island composed of sand eroded from the Appalachian Mountains and carried to the coast by rivers. The island's shelly sandstone layers, which can reach depths of over 100 feet, provide a unique insight into its geological history.

Today, the southern part of the island is protected as Bill Baggs Cape Florida State Park, while the middle section is home to the incorporated Village of Key Biscayne. The northern portion is occupied by Crandon Park, a county park. The island is also connected to Miami via the Rickenbacker Causeway, making it a popular destination for both locals and tourists.

Key Biscayne National Park is an important natural area that provides a unique glimpse into Florida's geological and ecological history. Its barrier island shape and sandy beaches make it a popular spot for outdoor recreation, while its protected areas provide a haven for wildlife and plants.

Key biscayne national park