The underground rivers at Xcaret in the Mayan Riviera in Mexico.
The Ice Crystal Rainbow (iridescent cloud) - Pacheco
Devils Tower in Wyoming
Belize ... This is called the ATM Tour or ATM Cave. It's amazing, you swim in with headlamps on and climb rocks and ladders to get to different levels. On each 'platform' you observe different artifacts. It's pitch dark inside with flowing water. Once in a lifetime tour, there are 25 guides that go through special training to be allowed to take tourists in the cave.
Bernese Alps Switzerland ...
The Milky Way over Mount Hood at Lost Lake, Oregon
lenticular clouds at sunset !!!spectacular gaudy display!!!