The San Juan (Spanish: Río San Juan), also known as El Desaguadero ("the drain"), is a 192.06 km (119.7 mi) river that flows east out of Lake Nicaragua into the Caribbean Sea. A large section of the border between Nicaragua and Costa Rica runs on the right (southern) bank of the river. It was part, with the lake, of a proposed route for a Nicaragua Canal in the 19th century. The idea of the project has been revived in the last decade, including the possibility of other routes within the country.