Their 2010 expedition confirmed what satellite images hinted at ... making it the largest natural arch on Earth. The Xianren Bridge is a natural masterpiece. The limestone arch gracefully bows ...

On Thursday, the life of a natural stone arch came to an end, according to a press release from the National Park Service.

Delicate Arch has to be the world's most famous natural arch. The opening beneath the arch is 46 feet high and 32 feet wide, making it the largest free-standing arch in the park, and over the ...