Thorncrown Chapel is one of the most remarkable pieces of architecture in the American South. Built in 1980 in the Ozark forest just outside Eureka Springs, the chapel consists almost entirely of wood and glass — 425 windows containing more than 6,000 square feet of glass set in a lattice of Douglas fir struts that rises 48 feet (14.5 metres) to a Gothic-arched roof. The interior is cool and hushed, filtered green light coming through the surrounding trees, and the effect is of being simultaneously inside a building and inside the forest.
The American Institute of Architects has repeatedly ranked Thorncrown Chapel among the best works of American architecture of the 20th century. It holds 100 people and is still in use as a non-denominational chapel for weddings and religious services. Visitors are welcome between morning services on most days — check the schedule on the chapel's website before going.
Sources: - https://en.wikipedia.org/wiki/Thorncrown_Chapel