Goree Island has become an important place of pilgrimage for African-Americans in particular. Although there is debate about the actual numbers of slaves that may have passed through the island and the Slave House in particular, its symbolic significance is nevertheless extremely important and offers a focal point for people to pay their respects and reflect on their heritage.
Goree Island is a really pleasant place to visit. It's an easy daytrip from Dakar, much more relaxed than the bustling city and there are several places to stay. Heritage tours from the US are readily available but you can easily travel there independently. For more travel information see my Guide to Goree Island.
Thanks to Mark Moxon for the use of his image of La Maison des Esclaves (House of Slaves)