Cape Florida Light, National Historic lighthouse in Key Biscayne, United States.

Cape Florida Light is a white cylindrical tower on Key Biscayne topped with a black lantern room. The structure stands above the shoreline and marks the Atlantic coast for maritime navigation.

The tower was built in 1825 and experienced multiple damages from hurricanes and conflicts during the Second Seminole War. Following these events, the structure was rebuilt several times to maintain its lighthouse function.

Before the tower existed, Cape Florida was a departure point on the Saltwater Railroad: in the early 1820s an estimated 300 Black Seminoles and escaped slaves left Key Biscayne for Andros Island in the Bahamas by canoe and Bahamian boat. The park is a designated National Underground Railroad Network to Freedom Site, one of only two in Florida.

Visitors can climb the tower during guided tours and reach the observation platform for views of the ocean and surroundings. It is advisable to wear comfortable shoes, as climbing stairs requires effort.

The 1825 contract specified solid brick walls five feet thick at the base, tapering to two feet at the top, but the contractor skimped and built hollow walls. The 1846 reconstruction reused bricks from the burned tower and brought new ones from Massachusetts; the lowest bidder won at $7,995.