This stunning geological phenomenon meaning “Cotton Castle” in Turkish is the site of the well-preserved ruins of the Greek-Roman city of Hierapolis. These ancient host springs can be visited all year round, but if you want to actually bathe in them, the winter is your best bet.
Scientists found this strange creature at the Great Barrier Reef’s Lizard Island and named it, aptly, the Christmas tree worm. One better might have been “fake plastic Christmas tree worm,” but it’s still a pretty good name. (Scientists also refer to it as Spirobranchus giganteus). The spiral “branches” are actually the worm’s breathing and feeding apparatus. The worm itself lives in a tube, and it can withdraw its tree-like crowns if threatened.