NANCY HOLT, SUN TUNNELS, LUCIN, UT (USA) 1976
concrete tunnels each 18 feet long and nine feet in diameter, open X configuration total a length of 86 feet (26 m) arranged to follow the sun as it passes the horizon at sunrise and sunset during the solstices
"It’s an inversion of the sky/ground relationship-bringing the sky down to the earth." N. Holt, 1988