Costa Rica - Panama 
DATUM POINTS
1. Mouth Sixaola River.
2. Confluence of the Yorkin River
3. Parallel 9° 30 ' North latitude
4. Meridian 82° 56 ' 10 "
5. Summit of the Mountain range of Talamanca
6. Bulging hill
7. Watershed
8. Punta Burica
Altitudes
on the level of the sea
Of 2000 TM to 4000 TM
Of 500 TM to 2000 TM
Up to 500 TM
Treaty: ECHANDI MONTERO-FERNANDEZ JAEN
Date: 1ero of May of 1941
Description of the limit: One begins in the mouth of the Sixaola river, follows by the lowest part of valley (deeper part), of this river until the confluence with the Jorkin river, continuous by the lowest part of valley of this river, until arriving at the parallel 9° 30 ' from North latitude. Luedo follows an air line until arriving at the meridian 82° 56 ' 10 ", follows by that meridian towards the south, until the summit of the Mountain range of Talamanca, follows by the summit until arriving at Bulging Hill, to follow by the watershed of the rivers that go to the Sweet Gulf and Bay of Blue Pool, is going to finish in Punta Burica. History: The history of our South border was full of difficulties. In 1573, Felipe II, king of Spain, subscribed a contract with the captain Diego de Artiesa and Chirinos. One settled down so Costa Rica extended, “by the Pacific, from the Chomes and borders of Nicoya, right to the mouths of the Drainage (San Juan river), everything what the Earth to the province of Veragua runs”. In 1836 during the government of Don Braulio Cheek the call took place “Colombian usurpation” in which this country was appropriated the territory violently that at the moment is Bocas del Toro, who belonged to Costa Rica, without our government could face the problem. Already for year 1856, 1865 and 1873 bordering treaties were made to avoid difficulties like those of 1836, but as these were not ratified by both governments, they did not have validity. In 1880, Colombia returned to invade our territory and it seized of Cocales de Burica, by such reason, the 25 of December of 1880, the representatives of our country and those of Colombia, decided to put under the arbitration of this bordering demarcation king Alfonso XII of Spain, but later this treaty was not known by Colombia. In 1886, in Bogota, a new convention was signed, which would be arbitrated by the then president of France, Emile Loubet. Years later, the 11 of September of 1890 the failure was emitted, but this it was not accepted by Costa Rica, since it harmed our country and it granted to Colombia more territory than those than were discussed. In 1905, after becoming independent Panama from the Colombian territory, the adiministración of president Ascención Esquivel tried to sign a deal with the new Panamanian government, but this it was not ratified by our neighbors of the south. In 1914 a new attempt occurred. Where the arbitration was made by the general prosecutor of the United States of America. It was known as “I render White”, dictation the 12 of September of 1914, where the Panamanian government was displeasure with the resolution. There were several attempts to establish I render, and in 1921, therefore, the War of Boundary with Panama took place. Finally the 1ero of May of 1941 signed the Echandi Treaty Montero-Fernandez Jaén.
Costa Rica - Nicaragua
DATUM POINTS
1. End Castile.
2. Margin of the San Juan river
3. Viejo castle
4. 2 miles of the Lake of Nicaragua
5. Sapoá river
6. Salinas bay
Treaty: CAÑAS-JEREZ
Date: 15 of April of 1858
Description of the limit: Castile begins in End, follows by the right margin of the San Juan river, until a point located to 3 miles English of Old Castle. Soon with center in Old Castle an arc of 3 miles of radio draws up, to continue to a distance of 2 miles English, until finding the Sapoáa river; of it follows an astronomical straight line here until the Saline center of the Bay in the Pacific Ocean. History: After our independence in 1821 two problems appeared; the rights on the San Juan river and the territory of the Greater Mayorship of Nicoya. The one of Nicoya is solved the 25 of 1824 July, when their inhabitants decided to be united to Costa Rica under the motto “Of the Mother country by our will”. The rights on the San Juan river were more problematic, specially for being scene of the 1856-1857 war. But finally the 15 of April of 1858 the treaty was signed Canes - Sherry, ratified in 1888. It establishes that the river belongs to Nicaragua, the limit goes by the right margin, but Costa Rica has right of navigation with commercial aims and not by boats military.
