"A HAWC eye on the sky" takes you on an audiovisual tour of a striking new astrophysics facility in Mexico. The High-Altitude Water Cherenkov (HAWC) gamma-ray observatory – which was inaugurated last year – is designed to catch a glimpse of some of the most extreme events in the cosmos. Located near the peak of the extinct Sierra Negra volcano, HAWC cuts a spooky image against the Mexican countryside, comprising 300 giant silver barrels with yellow tops that are filled with water.