We use the VLBI technique to obtain precise astrometric measurements to several young stars in nearby star-forming regions belonging to the galactic structure known as the Gould's Belt. These measurements will allow us to investigate the structure of the clouds and their internal kinematics and eventually to characterize the overall dynamics of the Belt. I will present the current status of the project focusing on three regions for which accurate distances and proper motions have been collected: Ophiuchus, Serpens and Orion. In addition, I will discuss how the high angular resolutions achieved with this technique will allow us to characterize the population of young, very tight, binary and multiple systems. Our results will be relevant to test the astrometry quality of both VLBI and Gaia observations by considering objects that both instruments can detect.