Google Places API

Providing a places search that can be searched by latitude/longitude, and “where” using full text search q ...

Providing a places search that can be searched by  hierarchical list of categories, longitude/latitude etc.

Providing a JavaScript places search that can be searched by search term, with a detail search for display by ...

You can search location using longitude and latitude, neighborhood, address or city and filter listings by “ ...

Gets all the countries, and obtain the most important information of these.