Built by Overland Partners,James Turrell Skyspace in Austin, United States with date Images by Florian Holzherr. The Color Inside is a milestone in The University of Texas at Austin’s Landmarks public art collection.
Álvaro Joaquim de Melo Siza Vieira (Pritzker Winner born on June 1933 is a Portuguese architect, and architectural educator. He is internationally known as Alvaro Siza. Notable Works/ Porto School of Architecture, Pavillion of Portugal in Expo Wikipedia
In the Basque sculptor Eduardo Chillida Tindaya Mountain, on Fuerteventura. Chillida's idea was to create a large empty void inside, with dimensions 50 x 50 x 50 meters, with an entrance tunnel of 200 meters and two skylights.