Hall­grím­skirk­ja is one of Reykjavík’s most famous land­marks and the largest church in the coun­try. It’s also home to an excep­tion­al­ly large organ by Johannes Klais, mea­sur­ing 15 metres tall with 5275 pipes. Archi­tect Samúels­son took inspi­ra­tion from the steep Ice­landic land­scape and its famous basalt columns for the design.