evidence: Venezuela administers a number of Caribbean islands and archipelagos, among which are Margarita Island, La Blanquilla, La Tortuga, Los Roques, and Los Monjes. Since the early 19th century Venezuela has claimed jurisdiction over Guyanese territory west of the Essequibo River totaling some 53,000 square miles (137,000 square km)—nearly two-thirds of the land area of Guyana. Venezuela also has had a long dispute with Colombia over the delimitation of maritime boundaries in the Gulf of Venezuela and around the archipelago of Los Monjes. [...] The islands and coastal plains are located in the north. They include the Caribbean "Islands to the Leeward," such as Margarita and La Tortuga, and several peninsulas, including the head-shaped Paraguaná in the northwest and, in the northeast, Araya and Paria, the latter a finger of land pointing at Trinidad. The coastal plains extend from the Colombian border and the Gulf of Venezuela eastward to the foothills of the coastal mountains, which are broken in the east by the Unare River basin. Farther east is the Orinoco delta, which opens onto the Atlantic Ocean through a number of distributaries (caños); an early gateway to the settlement of the interior, it is a low, dank, and swampy area heavily dissected by streams.