One of the places on the list while we were in Moab, UT was Delicate Arch. It is a 65 foot tall, freestanding arch and can be found in Arches National Park. Finding it does require a 3 mile round trip hike that gains 480 ft in elevation. It also gets very hot here, but we got a break on our hike up for sunset...it was only in the high 80's and on our way back down it rained on us, which we welcomed at the time.
Aperture Priority, 1/100th second, F/11, ISO 100, 51mm
I shot this at "sunset". I put sunset in quotes because you really can't shoot this at sunset. A shadow starts to come in and block the arch the closer you get to the actual sunset time. Once that shadow starts to creep in your scene, the shooting is pretty much over. We also had to deal with an enormous amount of people here. People were all over the place. They were lined up in a long line to take turns to have their picture made under the arch. Trying to snap shots around the people was the biggest challenge.
I made this image with my Canon 5D III and Tamron 24-70mm Lens resting atop my Sirui tripod and K-40X ballhead.