Pepe
Google
If you go with a local guide there, please be careful and confirm the price before you go!! The local guide in tourism information centre told me the tour is GH¢50 but once I finished my walking tour, he told me it's GH¢150 (US$10) because each site is GH¢50. I appreciate him for telling me history, but I also hope he could use part of the money to support the community as he said, not just only scam me.
Overall, the place is worth a visit and tour guide also helped me gaining a lot of history knowledge about British Accra(Jamestown). You'll learn how British came here and did slaves trading around Jamestown fort in 1700s.
However, if you want to walk alone it's free, but you won't be able to enter the Jamestown Fort.
The below photos showed my whole tour that tour guide arranged.