At least 4000 feet in the air a three-foot-wide walkway clings to one face of Tianmen Mountain in Zhangjiajie, China, above a rocky ravine. With a glass bottom, the tourist attraction provides a crystal-clear view of where one wrong step could take you.
Cathedral in the Desert, Utah/Arizona borderlands by John Mumaw - the only cottonwood tree for miles around, nurtured and protected from the harsh environment by the cool, moist soil found in this unique, teardrop shaped sandstone alcove.
Columns of an Ancient Egyptian Temple in Luxor, Egypt. I've been there--this peristyle is a forest of huge decorated and painted columns which are immense and the whole is overwhelming in its massive power.