Tumbling down a nearly 200 metre drop in Yosemite National Park, Bridalveil Fall is a spectacular scene of nature.
But occasionally, when conditions permit, the magnificent waterfall is transformed into and even more spectacular sight. With just the right mix of water vapour and light, it becomes an beautiful rainbow haze that permeates the lush vegetation and dramatic rock faces around it.
This breathtaking sight only last a few minutes, as the disappearing sunlight passes across the mountainous backdrop and reflects on the vaporised water.
But for patient photographer Mei Xu, it was certainly worth the wait.