Sagrada Família Basilica in Barcelona, Spain is a wonder of Modernisme architecture. Although I think of Gaudí’s style as being very rounded and natural, he also uses angles incredibly well. In the Passion façade, he uses stark angles to show the harsh bleakness of Christ’s passion and death.
In the interior, he uses organic angles on the tree-like pillars to give a sense of opening above. And outside, he includes many peaks that point heavenward.
You can find more angles at the original Lens-Artist challenge.