Laura Waters

One of our group is crying quietly inside the hood of her jacket as the nine-seater aircraft quivers and bucks in the wind. “Is this normal?” I yell over the hum to Gonzalo, our guide. “It’s a normal windy-day,” he nods with a smile. Then the pilot cranks the engine to taxi for take-off.

Austria's glacial ice cave—not recommended for claustrophobics.