Key Biscayne, FL

A single roadway gives Key Biscayne its clearest practical boundary. The Rickenbacker Causeway runs 3.6 miles across road and bridge segments from Miami through Virginia Key and provides the island's only land ingress and egress. Crandon Park lies immediately north of the incorporated village, and Bill Baggs Cape Florida State Park occupies the island's southern end. Between them, homes and village streets sit on a narrow barrier island with the Atlantic to the east and Biscayne Bay to the west. Crandon's Bear Cut Preserve opens onto mangrove and coastal habitat on the bay side. For residents, geography is a daily fact: mainland drives use the same causeway as trips bound for the county and state parks.

ATTRPaulkondratuk3194 at en.wikipedia / CC BY-SA 3.0

This arrangement grew from a coconut plantation and a bargain over public land. William John Matheson bought about 1,700 acres in 1908, and the plantation had 36,000 coconut trees by 1915. In 1940, the Matheson family offered 975 acres to the county for a park on the condition that a causeway be built. Crandon Park and the Rickenbacker Causeway opened in 1947, and the first residential subdivision broke ground in 1950. The count rose from 29 residents in 1950 to about 2,500 in 1955. Key Biscayne incorporated in 1991. The parkland that enabled access also kept both ends of the developed village in public use.

ATTRPresident (1969-1974 : Nixon). White House Photo Office. 1969-1974, General Services Administration. National Archives and Records Service. Office of Presidential Libraries. Office of Presidential Papers. 1/20/1969-ca. 12/1974 / Public domain

Cape Florida carries an older and wider history. Its lighthouse was completed in 1825, damaged during the Second Seminole War, and rebuilt in 1846; it is Miami-Dade County's oldest standing structure. The cape also served as a departure point where escaped slaves and Black Seminoles sought passage to the British Bahamas, a history recognized by the National Park Service's Network to Freedom in 2004. The setting itself continues to change. Key Biscayne consists of sand over Key Largo limestone, and tides and currents move that sand through erosion and deposition. Twentieth-century groins, jetties, and beach renourishment record the continuing work of managing the island's shoreline.

ATTRSebastian Carlosena / CC BY-SA 3.0

Inside the village, community activity gathers around a small set of connected spaces. The 9.5-acre Village Green has a half-mile jogging path, and the Community Center at its southern edge hosts aquatics, arts, fitness, lectures, and programs for older residents. East Enid Linear Park forms a half-mile green connection from Lake Park toward Beach Park. Access rules differ by shoreline: the village's Beach Park requires a resident fob, whereas Crandon and Bill Baggs serve the broader public. The library is in transition as well. The branch being replaced opened in 1985 after residents petitioned for a permanent library to succeed twice-weekly bookmobile visits. Miami-Dade County broke ground on the new branch on May 26, 2026, with completion expected in 2028. The replacement will be nearly three times larger; during construction, library service operates from temporary quarters in Key Colony Plaza. For now, residents borrow books in a plaza storefront; access to the village beach still depends on a fob.