To evaluate the stratigraphy along an underground tunnel alignment between RK Ashram and Nabi Karim for the Delhi Metro, a detailed study was performed. This included geotechnical investigation by drilling boreholes, performing in situ permeability tests and dilatometer tests together with geophysical surveys such as seismic refraction tests, electrical resistivity tomography, and cross-hole seismic tests. Using a combination of geotechnical and geophysical testing, a reliable geotechnical-cum-geophysical model was developed to characterize the ground profile and trend of rock along the metro alignment.