In the serene landscape of Sunnfjord, Norway, where the rugged hillside gently meets the water, PAX Architects has envisioned an innovative museum that appears to descend into the earth. This unique proposal, called The Cave, maps out a 1,500-square-meter visitor center for Astruptunet, the famed former home and artistic hub of painter Nicolai Astrup. The Danish studio’s design emerged as...