I hate to burst the bubble:
From the always suspect Wikipedia reference "The geography of Jamaica is diverse. The western coastline contains the island's finest beaches, stretching for more than 6 km (3.7 mi) along a sandbar at Negril. It is sometimes known among tourists as the "7-Mile Beach" although it is only slightly more than 4 mi (6.4 km) in length, from the Negril River on the south to Rutland Point on the north."