Cool, great photos so far! Will try to throw in a few comments...
And here a few of my domes and arches:
Entry: Delicate Arch (Arches Natl Park, Utah)
Great entry, Patrick and wonderfull series of NE's!!
What a fantastic and impressive series you have Patrick.
This challenge is now closed - will be back shortly, or longly (if that is a word) because there are so many great shots to sort through.