For decades, hydrocarbon accumulations beneath the Gulf of Mexico allochthonous salt canopy were largely considered implausible. The paradigm shift that success could be achieved in deepwater subsalt settings began in 1990 with the Mica discovery. Today, besides an expanding exploration portfolio, industry has the fortunate task of facing the many and varied challenges of subsalt appraisal and development. With this transition comes the need for robust and accurate subsurface characterization. Beneath a salt canopy often many thousands of feet thick, this is a challenge from many viewpoints, from drilling and reservoir management to seismic imaging.