I will present my work on two novel ways to map the Galaxy. The first one exploits a particular class of dark matter tracers — hypervelocity stars. These are stars observed in the halo with trajectories consistent with coming from the Galactic. My group has undertaken a comprehensive program to find them in the Gaia catalogue and model them in a full statistical framework to extract information on the mass and shape of the Milky Way’s halo. In addition, we are forecasting the ability of double white dwarfs to trace the Milky Way bulge and disc, when combining Gaia data and future gravitational wave detections by the ESA mission LISA.