Virtual Reality is a powerful, although still fairly new, medium; its immersion and involvement capability is particularly useful in the cultural heritage domain, where it can be used to visualize places or artifacts long gone. However, its employment in museums has brought a problem to light: how to design an interface simple enough to be easily used even by someone who has never experienced Virtual Reality before, which is the case with a fair number of museum-goers. This thesis examines the most common interfaces for heritage VR applications, paying particular attention to the navigation system, in relation to the Finnish Pavilion project (a virtual interactive reconstruction currently on show in the Design Museum of Helsinki).