Morro de Arica (pictured) in Aricalooks like a giant sand dune from afar, but it's actually entirely made of solid rock.
The first English-Tongan dictionary was written by William Mariner, who was one of only 4 men on his ship who weren't killed by the natives when they landed in Ha'apai.
Saint Louis Cathedral in Saint-Louis, a Roman Catholic church that opened in 1828 is the oldest functioning church in West Africa.
