Example localisations of giant radio galaxies within the large-scale structure of the Local Universe. The top row shows two cluster giants, the middle row shows two filament giants, and the bottom row shows two sheet giants. For each giant, we show a slice of constant Cartesian comoving z through the late-time BORG SDSS posterior mean total matter density field and a LoTSS DR2 6″ image at ν_obs = 144 MHz (inset). Outside of the SDSS DR7–constrained volume, the posterior mean tends to the Universe’s late-time mean total matter density ${\overline{\rho }}_0$. The locations of the giants are marked by white circles.