The island(s) of Miquelon-Langlade consists of three formerly separate islands Miquelon (110 km2), Langlade (91 km2) and Le Cap. In the 18th century, an isthmus of sand called La Dune was formed naturally between Miquelon and Langlade. The isthmus was reinforced by hand with sand and Quaternary deposits to what is now a 13-kilometre (8.1 mi) sand dune.