Kinda nerdy, 1st-hand description (embed):
The Very Large Array, one of the world's premier astronomical radio observatories, consists of 27 radio antennas in a Y-shaped configuration on the Plains of San Agustin fifty miles west of Socorro, New Mexico. Each antenna is 25 meters (82 feet) in diameter. The data from the antennas is combined electronically to give the resolution of an antenna 36km (22 miles) across, with the sensitivity of a dish 130 meters (422 feet) in diameter.
We will be offering our regular guided tours of the VLA every first Saturday of the month, from 11AM to 3PM.
Site: National Radio Observatory