Mahler has some lovely moments, but no doubt it takes a commitment to have a chance of being able to soak it all in.
Even that Kansas wheatfield, like nature in general, has a lot of interesting things going on in places, but you gotta slow down or even get out of the car to have a chance of seeing it.
Mahler #3 is mostly about nature I believe, so the Kansas wheatfield comparison is probably a reasonable one.