Overview of the northern Cygnus X region. The three colour image displays Herschel 70 μm (blue), 160 μm (green), and 250 μm (red) emission (Schneider et al. 2016). The 70 and 160 μm emissions indicate the distribution of hot dust while the 250 μm trace the cooler dust mostly associated with molecular gas. The main objects are labelled in yellow, the filament notation stems from Hennemann et al. (2012). The B star #227 is indicated with a black star symbol. The ‘Diamond’ of the Diamond Ring is Cl 13 (Le Duigou & Knödlseder 2002). The [C II] mapping covers the DR21 ridge and the Diamond Ring (Schneider et al. 2023; Bonne et al. 2023a). Here, we focus on the area outlined by a white square.