Top: Haslam 408 MHz map is shown with circles indicating loops from Berkhuijsen et al. (1971). These ridges of enhanced Galactic radio emission are seen across the sky at low radio frequencies. The North Polar Spur ("Loop I") and the Cetus arc ("Loop II") are examples of these features, which have been described as the remnants of individual supernovae, or of correlated supernovae outbursts that produce blowouts, or as helical patterns that follow the local magnetic fields projecting out of the plane. Four such loops can be seen in the Haslam 408 MHz radio map and the WMAP map. Note that the color stretch is logarithmic in temperature. Bottom: WMAP K‐band polarization map with the same loops superimposed. Note that the highly polarized southern feature is close to the North Polar Spur circle and may be related to the same physical structure. Note also that the polarization direction is perpendicular to the main ridge arc of the North Polar Spur, indicating a tangential magnetic field. This is also seen in the southern feature. Whether or not they are physically related remains unclear.