Pool boiling is explicitly coupled with nanoscale evaporation by using buried nanochannels to enhance critical heat flux (CHF) by ~105%. Additional menisci and contact line formation in nanochannels is found to be the dominant factor of CHF enhancement. Wicking assists in creating the additional contact line, but does not serve as the primary measurable factor in predicting such enhancement based on CFD simulations and wicking experiments. This work provides clarity on the roles of contact line and wicking in boiling heat transfer.