The implementation of 3D virtual reality (VR) environments to represent human culture and heritage has been growing during the last two decades as a result of information and communication technologies (ICT) development. Precisely, regarding virtual heritage development, some weaknesses have been detected such as ''lifeless'' environments lacking interaction, and research still under development on learning assessment. In this article, a VR environment is presented, through users taking a virtual tour visiting some elements of cultural heritage of the island of San Andrés, Colombia. In the tour, users participate in a 3D VR environment, answering questions and learning about the cultural heritage of the island. Also, the usability of the VR environment is assessed through SUMI (Software Usability Measurement Inventory) standard ISO9241-11 evaluating aspects such as usefulness and learnability. The results demonstrate that with the implementation of a VR environment about heritage, the users achieved optimum performance with an 80% average of correct answers and a high correlation between learning and the usability of the 3D VR environment.