Update and reinstate "Around the world" page

[emmaffiondavies]

As of #70, we've hidden the "Around the world" page in the "About" section, as it's out-of-date and needs updating. Update the content as part of this issue and reinstate the page.

[emmaffiondavies]

@robandbarbaradavies to design the content updates and @andiemmadavieswilcox to implement the changes.