The delta region covers Barrancas and Piacoa. The Atlantic coast as its base, 165 miles (275 kilometers) long between Pedernales and the Gulf of Paria, north, and Punta Barima and Amacuro, south, now extends 12,000 square miles (30,000 square kilometers), is growing in size. Fluctuation in size and depth are Macareo, Sacupana, Araguao, Tucupita, Pedernales, Cocuima channels and an arm of the Rio Grande.
The Orinoco delta is constantly changing as the river carries sediments to create and expand the islands, change channels and channels called pipes. It pushes into the Atlantic Ocean, but as the sediment collected and disseminated outwards, the weight of what creates the sinking also changes the topography of the delta. Dredging keeps the main channels open for navigation, but the rear channels, where mangroves and vegetation is lush,
Tortola, Tiger Island and Mata Mata, are some of the most famous islands of the delta.
The Orinoco Delta (Mariusa) in the delta covers 331,000 acres of forests, wetlands, mangroves, variety of flora and fauna. It is the home of the Warao tribe who follow their traditional lifestyle of hunters / fishermen. The delta here is prone to extreme tidal action. Here also is the Guácharo Cave, the cave with prehistoric petroglyphys Alexander Von Humboldt discovered while exploring the area.
Camps and shelters in the area to visitors the opportunity to explore the reeds by small boat, fish, enjoy the wildlife and bird watching.