The Pop-Up Museum offers cultural institutions and content holders in general the opportunity to showcase their digitised collections and to engage new and existing audiences with effective virtual exhibitions. Only having digital objects accessible online does not guarantee visitors a cultural experience comparable with a physical visit to a museum. For a real cultural experience we need to move the digital objects back into a physical museum-like context. This experience can be practised in museum-like venues e.g. a conference room, but also in non-typical places such as an open space, a waiting room or an entrance hall. The Pop-Up Museum is a low-cost, easy to set up, interactive cultural experience. The system is designed in such a way that cultural institutions can easily build an interactive exhibition themselves, that can be placed anywhere, designed to offer engaging digital cultural experiences to visitors at museums and art galleries, but also at locations such as waiting rooms, entrance halls, offices and classrooms. A Pop-Up Museum transforms a small portion of space into an island dedicated to art and culture, where visitors or passers-by may dwell a while, using their mobile phones or tablets to bring the screen or screens to life. The application is very low-cost, uses web-standards and requires hardware (a smart screen) that is often already at hand or can be easily adapted.