When nuclear Overhauser enhancement spectroscopy (NOESY) experiments are performed around the critical point ωτc= 1.12, internuclear cross-relaxation rates are dependent on the resonance frequency ω, where τcis the reorientation time of the distance vector between two magnetic dipoles. Therefore, the correlation times and, consequently, the internuclear distances can be determined precisely by measuring the cross-relaxation rates under two magnetic fields. An application with a cyclic pentapeptide is given as an example, demonstrating the use of the two-field NOESY method in molecular structure studies. NOESY experiments with mixing times beyond 500 ms are discussed.