Arches National Park, Utah

Arches National Park seems to be the most popular with those visiting the Moab area - but to be honest  if I had to choose between one National Park and had to choose between Arches and Canyonlands - I would pick Canyonlands.  Not that Arches is not impressive, because it is - but Canyonlands puts the visitor right at the canyon floor (at south entrance) and above the canyon at the north entrance.  It also offers very impressive expansive views of canyons as far as you can see - and arches to boot (Mesa Arch is my favorite)

As for Arches, I was able to see the major hot spots including Windows (North only), Turret Arch, Double Arch, Fiery Furnace, Devil's Playground, Pine Tree Arch, Tunnel Arch and of course Delicate arch.  I used my 150-500MM lens for the above photo of Delicate Arch as it was a 3 mile hike to get close to the arch. All the photos I took at Arches can be seen here.  Yesterday was a hot day and it felt like 100 degrees out.  I went through quite a bit of liquids and kept my hiking to short distances.

There were many more arches to check out if I was willing to hike.  I was trying to find Landscape Arch but never found it.

I would have to say that my visit to Canyonlands National Park (south entrance) kind of spoiled my visit to Arches since there are similar structures viewable at both parks.