A company that has its seat in San Francisco, Geotrio is putting together a library of GPS-based tours both for smartphones and web browsers.
Tours for travelers, tours for people who are visiting a neighbourhood for the first time, and even tours for people who want to take the dog for a walk are included here. And as it is only logical for a site this encompassing, tours can be looked up both by city and by theme.
As well as individuals who want to share their knowledge and expertise with everybody, these tours are contributed by professional guides, hotels, academic institutions and rental companies.
Each featured tour comes with a rating (from 1 to 5 stars), comments and likes. And integration with Facebook and Twitter is already provided, so that sharing cool tours is done in a mere couple of clicks.
The Geotrio app can be downloaded for free from the AppStore.
Geotrio.com In Their Own Words
Search for tours, take them, and share them with your friends.
Why Geotrio.com It Might Be A Killer
It makes for finding the best ways in which to experience and enjoy any city you are going to visit for the first time.
Some Questions About Geotrio.com
Which categories of tours could be added now? In which further ways could people interact among themselves? 
