1. Did you enable the 'Share Location' option in your browser? It should have appeared on pageload.
2. The 'More Options' should allow you to change the city/area.
Also, could you let me know which browser and OS you're using?
EDIT: corrected typo.
(EDIT: I reloaded again, and I saw a bar come down asking if I can give this site my location. The bar was in light blue, and it was well camouflaged with the title of your page, and it also disappeared in a few seconds, so I never saw it the first time)