Natural Bridge is misnamed - this "bridge" is technically an arch. Natural bridges are sculpted by rushing streams, whereas subtler forms of weather have sculpted this opening.

The structure called Natural Bridge is one of several natural arches found in Bryce Canyon.
This one is particularly photogenic; it has been sculpted from some of the reddest rock of the Claron Formation, which is rich in iron oxide minerals.
From many vantage points you can frame rich green, Ponderosa pine trees through the arch.