I will go...
Lava pool in Maderia, Portugal
A rather more serene photo of the Devil's Pool (photo credit: Annie Griffiths.) Not sure that I would look quite this relaxed and contemplative standing at the edge of a 360ft drop.
Petra, Jordan. Petra is not mentioned in the Bible by that name; rather it is called by its Hebrew name, Sela, in Isaiah 16:1 and 2 Kings 14:7. Both “Petra” and Sela mean “rock,” an appropriate name since much of the city is carved into sandstone cliffs. Today its ruins lie uninhabited, in fulfillment of the prophetic word: “‘As Sodom and Gomorrah were overthrown, along with their neighboring towns,’ says the LORD, ‘so no one will live there; no people will dwell in it’” (Jer 49:18).
Bucket List - Petra, Jordan.
Fraser Island, Australia - Fraser Island is the world's largest sand island, composed of sand accumulated over approximately 750,000 years. It contains over 100 freshwater lakes, and dunes reaching up to 260 m (850 ft) above sea level. Due to naturally occurring mycorrhizal fungi present in the sand, it the only place in the world where tall rainforest grows on sand.
whitsunday islands -
Waimoto glow-worm Caves in New Zealand