36 Breathtaking Churches Across the U.S. to Add to Your Bucket List

27. Unity Temple – Frank Lloyd Wright's Concrete Masterpiece (Oak Park, Illinois)

Step inside one of modern architecture's most radical and influential religious buildings. Designed by Frank Lloyd Wright for a Unitarian Universalist congregation after their previous church burned down, Unity Temple (completed 1908) was groundbreaking for its use of exposed, poured-in-place reinforced concrete. Wright called it his "first contribution to modern architecture." Its cubic exterior hides a stunningly intimate, top-lit sanctuary designed to bring the community together, marking a departure from traditional church layouts. A National Historic Landmark, it’s a pilgrimage site for architecture lovers worldwide.