In which unit of the National Park System was this photo taken, and what does it depict?

Readers who answer correctly will be eligible for our monthly prize drawing.

The answer will be posted in tomorrow's Traveler.

No cheating! If we catch you Googling or engaged in sneakery of any description, we'll make you write on the whiteboard 100 times:

The atomic clocks used to record Coordinated Universal Time (UTC) are hyper-accurate, but not quite accurate enough. To maintain the globe's official standard time, "leap seconds" must be added during leap years (years divisible by four, unless divisible by 100 and NOT by 400).  The next leap second will be added at one second before midnight on June 30, 2012.  As a consequence, clocks recording UTC time on that date will display 23:59:59 for two seconds instead of just one.