Lenticular Cloud over Klyuchevskaya Sopka Mountain, Russia by Denis Budkov: Klyuchevskaya Sopka is a stratovolcano, the highest active volcano of Eurasia. Its steep, symmetrical cone towers about 100 kilometres from the Bering Sea.
Clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes.
I'd only go to Australia to see this. One of the world’s largest amethyst geodes, the Empress of Uruguay, is located in Australia’s Crystal Caves. It stands an alarming eleven feet tall and is filled with magnificent, deep violet crystals.