In the countryside surrounding Aarhus, Denmark, the 700 year-old Kalø Castle has been revamped by Copenhagen-based MAP Architects. The firm has installed zig-zag stairs made of steel and clad in ash wood with balconies made of glass allowing tourists to admire the landscape. Although the site has been a tourist attraction for decades, it is now fully accessible to the public. The stairs are only supported by the castle at four points to minimize damage to the monument. Read more about the castle at Curbed.