The new updates on macOS and tvOS have some really stunning images.
The Apple TV has new flyover screensavers which are available now, but none from any African city, unfortunately. I think Cape Town and Johannesburg have got some really nice structures if Apple looked hard enough. iDownloadBlog did the work categorizing the new flyovers and extracting direct download links.
If you want to check out the new visuals on Apple TV, you can see the download the additional cityscapes by going to Settings > General > Screensaver.
To check out these new macOS visuals, simply update your operating system, right click on a blank part of your desktop, and choose one of the the new wallpapers.
Some sample images.