I’ve had occasion, recently (or so), to visit Antelope Canyon and its surrounding area.
It’s a spectacular sight, a photographer’s dream, whether very amateur like myself or otherwise.

Antelope Canyon(s) are slot canyons, unique flukes of geology. The Navajo sandstone of the region is very porous and long, long ago, flood waters rushed through the canyons and carved away the weaker stone. They’re formed very suddenly as landscapes go. Their smooth, winding walls are sculpted steadily by monsoon rains and more floods.
It’s a funny thing to think about: once, there were no canyons here. Now, and for long ages, there are. Eventually, they will be gone, even if they last to the death of the Sun. And they will always be changing, daily.