Ile de Goree
Goree Island in English, it was named by the Dutch after taking over the island from the Portuguese in the late 1600s. Goree was a minor location used for the transport of slaves headed to the Americas, though its prominence is often overplayed. The island has interesting colonial architecture, mostly in ruins, including the landmark "House of Slaves" museum. This is a place with a great atmosphere, because it gives you kind of an pirate-island with friendly folks all-over kind of feeling. Just walk around and explore. It's a small island, so you can easily stroll around it in an hour. You can buy cheap beer and lounge on the beach when you're done, or stroll some more and buy art-work from the locals.
African Renaissance Monument
Opening its doors in December 2010, this colossal monument is dedicated to Africa's emergence from the oppressive European regimes that once ruled the continent and the end of slavery. It is also meant as a display of African pride to shirk foreign perceptions of Africans as lesser people. The monument is rather controversial, with some Africans feeling the sense of pride it is meant to envoke while others criticizing it as a foreign it was made by North Korea, completely un-African Stalinist statue. From base to the top, it reaches taller than the Statue of Liberty.