The southern third of the Florida peninsula is largely taken up by protected government land that includes Everglades National Park, Big Cypress National Preserve, and Biscayne National Park. Miami lies to the northeast, with Naples and Marco Island to the northwest. Land access to Everglades National Park is primarily by two roads. The park's main road traverses the southern Everglades from the gateway towns of Homestead and Florida City to the outpost of Flamingo, on Florida Bay. To the north, Tamiami Trail (U.S. 41) cuts through the Everglades from Greater Miami on the east coast or from Naples on the west coast to the western park entrance at Everglades City at Route 29.