Curiosity

There are things one wants to see just to see—something awesome, like Bryce Canyon or Antarctica; or a place or series of places, like Angkor Wat or the Trans-Siberian Railway. Some things, like the Great Pacific Garbage Patch, may have to be seen to be believed. What are you curious about? and what would it mean, or what difference would it make, to have seen it? What might you bring back?