Nearly 500 rivers lace Panama's rugged landscape. Mostly unnavigable, many originate as swift highland streams, meander in valleys, and form coastal deltas. However, the Río Chagres (Chagres River), located in central Panama, is one of the few wide rivers and a source of hydroelectric power. The central part of the river is dammed by the Gatun Dam and forms Gatun Lake, an artificial lake that constitutes part of the Panama Canal. The lake was created by the construction of the Gatun Dam across the Río Chagres between 1907 and 1913. Once created, Gatun Lake was the largest man-made lake in the world, and the dam was the largest earth dam. The river drains northwest into the Caribbean. The Kampia and Madden Lakes (also filled from the Río Chagres) provide hydroelectricity for the area of the former Canal Zone.
Today, there are different types of polleras; the pollera de gala consists of a short-sleeved ruffle skirt blouse, two full-length skirts and a petticoat. Girls wear tembleques in their hair. Gold coins and jewelry are added to the outfit. The pollera montuna is a daily dress, with a blouse, a skirt with a solid color, a single gold chain, and pendant earrings and a natural flower in the hair. Instead of an off-the-shoulder blouse it is worn with a fitted white jacket that has shoulder pleats and a flared hem.
One of the most important Panamanian artists is Alfredo Sinclair. He has worked for over 50 years in abstract art and has produced one of the most important artistic collections in the country. His daughter, Olga Sinclair, has also followed in his footsteps and has become another force in Panamanian art. Another very prominent Panamanian artist is Guillermo Trujillo, known worldwide for his abstract surrealism. Brooke Alfaro is Panamanian artist known throughout the world for his uniquely rendered oil paintings. Another prominent artist is Mario Calvit, known as one of the great painters of the generation that flourished in the country between the decades of 1950 and 1970.
President Barack Obama addressed the overseas shell companies listed by the leak in a press conference: "It's not that they're breaking the laws," he said, "it's that the laws are so poorly designed that they allow people, if they've got enough lawyers and enough accountants, to wiggle out of responsibilities that ordinary citizens are having to abide by." Although no leader in the US was mentioned in the Panama Papers, Obama said that "Frankly, folks in America are taking advantage of the same stuff".