Among Sundy’s many points of interest is the planting of the very first cacao tree in the archipelago in 1822.
It was also here at Sundy that in May 1919, Sir Arthur Eddington, on an expedition to observe a solar eclipse, was able to confirm Albert Einstein’s General Theory of Relativity. (His observation was based on the curvature of light rays, or the deflection of light, which proved that space and time were not absolutes as Newton had claimed.). Thus, Sundy and Príncipe island became forever associated with one of the most important scientific discoveries in the History of Science .
In Guia Turístico de São Tomé e Príncipe, Pocket Tropics