Maps of the outflow cavity wall tracers toward S68N, TMC1, and Emb8N with the CO low-velocity outflow map for reference. Top: Moment-0 maps toward S68N of CO and C₂H, H¹³CO⁺ obtained in band 6 at 0.′′5 resolution and CN in band 3 at 3′′. Middle: Moment-0 maps toward TMC1 of CO, c-C₃H₂, and ¹³CS and CN obtained at 0.′′5. The emission is integrated from -5 to -1 km s⁻¹ and from 1 to 5 km s⁻¹ with respec to v_sys. Bottom: Moment-0 maps toward Emb8N of CO, c-C₂H, and H¹³CO^{+ 13}CS at 0.′′5 in band 6. and CN in band 3 at 3′′. The emission is integrated from -5 to 5 km s⁻¹ with respect to v_sys.