This document discusses mobile storytelling platforms that allow museums and cultural institutions to create location-based audio and visual content tours that visitors can experience using smartphone apps. It describes the 7scenes platform, which provides tools for content management, online publishing of tours, and mobile apps. The platform was used to create a large mobile storytelling initiative in Amsterdam involving over 20 museums. Key lessons learned include the importance of effective storytelling, indoor/outdoor content, communication strategies, collaboration between institutions, and integrating mobile experiences into the full tourist visit cycle. Future directions discussed include improving indoor positioning, opening content creation, analyzing user data, and partnering with other cities.