These guys (and gal) top the list!
This is quite possibly one of the funnest swimming holes on earth. The mud factor is extraordinary, it's very deep, and it's location is breathtaking....indian creek just on the edge of canyonlands. The kids build mud structures for hours under the cool overhangs and jump in as needed to clean off the hardened mantle of mud. You should see the sleeping bags after this camping trip!
Hot air balloons make me giddy. Especially in the Mancos Valley. I scream like a child when I see one and immediately set after them as a 'chase' vehicle.
Motorcycle transport to school is always a favorite. More faves still coming...