Learning in virtual reality (VR) is always happening in a certain digital space. Inspired by memory techniques such as Method of Loci AKA Memory Palace, we propose to use a VR 3D space as a form of Memory Palace which would enhance the learning process by attaching new knowledge to spatial experience. Aim is to create multi-sensory experiences and help people to form deeper memory traces of learned topics. To achieve desired efficiency we need easily remembered space, which would help to create rich episodic memory. It is also important for the environment not to disturb and attract too much attention from the learning topic. To find this thin line, we tested memorability of VR space through experiments with 9 different environments each deferring in the level of abstraction and detail of the scenes. Subjects walked through the environment in VR and were instructed to perform various memory tasks. Results show that an environment with a middle level of abstraction and detail was easiest to remember, since it achieved a certain level of newness while being well comprehensible.