Caribbean SeaGuatemalaMexico- Sumas River (Wikipedia)
The Sumas River is a river in the Fraser Lowland and a tributary of the Fraser River system, coursing across the international border between the Canadian province of British Columbia and the U.S. state of Washington.
- Belize (Wikipedia)
Belize (/bɪˈliːz, bɛ-/, bih-LEEZ, beh-; Belize Kriol English: Bileez) is a country on the north-eastern coast of Central America. It is bordered by Mexico to the north, the Caribbean Sea to the east, and Guatemala to the west and south. It also shares a water boundary with Honduras to the southeast.