The short answer is yes, you should have one page of your site set-up for each location that you're targeting. Some companies prefer to have a subdomain for location (ie: location.domain.com), the problem with this approach is that that a sub-domain is technically viewed as a separate domain, so it won't really benefit from the trust and authority built up in the main domain.

Browser cache are useful for web browsing , but a real pain point for developers.

Modern day browsers nowadays cache every front end resource like javascript or CSS style sheets. They primarily do this to increase the website performance. But this can be really irritating while one is in development mode and constantly modifying the javascript or css style sheets. The only way to see the changes is by doing a hard refresh or clear the cache of the browser.