Geotrio Inc. is a San Francisco-based media company that is creating a world-wide library of GPS-based tours for smart-phones and web-browsers.

Geotrio launched their service on March 4th as a centralized platform for anyone to create, take and share tours. Tours range from historical and architectural tours for travelers, campus tours for prospective students, neighborhood tours, local shopping tours, and more.

The startup is also unveiling an iPhone app that will detect tours in your geographic area and allow users to download audio tours created by professionals as well as by amateur guides.

Bootstrapped Geotrio has signed partnerships with a number of partnerships with universities and businesses to create tours. list of partners includes tour guides, academic institutions, hotels, bike rental companies, DMCs, and many other individuals and institutions who would like to share their tours with others.

Geotrio’s is poised to become the “YouTube of Tours,” with thousands and thousands of tours in any location, theme, and language imaginable: historical and architectural tours for travelers, campus tours for prospective students, neighborhood tours, dog-walking tours and local shopping tours.