Q. With which nation Nicaragua has ownership dispute over the waters of San Juan River?
Answer: Costa Rica
Notes: Costa Rica and Nicaragua are the two nations involved in the San Juan River Border Dispute. This dispute arises in the interpretation of delimitation and navigation rights on the San Juan River, as per the Canas-Jerez Treaty of 1858. The 2010 Dispute regarding the dredging of San Juan River was called by the media as Google Maps War. San Juan River flows from Lake Nicaragua into the San Juan Lagoon on the Caribbean Sea. A large section of the border between Nicaragua and Costa Rica runs on the south bank of the San Juan River. The San Juan River is home to freshwater bull sharks.