Osu Castle, Accra (must see)

Osu Castle, also known as Fort Christiansborg is a castle on the coast of the Atlantic Ocean's Gulf of Guinea.The first substantial fort was built by the Danish in the 1660s, though the castle has changed hands between Denmark, Portugal, the Akwamu, the British, and finally post-Independence Ghana, and was rebuilt numerous times.

For most of the castle's history it has been the seat of government in Ghana with some interruptions. Osu Castle remains the seat of government in Ghana, employing 2,100 workers. The present castle is made up of various extensions to the original and is thus in an unorthodox shape; additional rooms were built in order to accommodate Queen Elizabeth II's visit in 1961, one year after Ghana became a republic. Osu Castle is not open to the public, and photography of it is restricted.