As manatees can’t survive in water below 60 degrees, they migrate to Kings Bay and the adjacent rivers every winter, which are an average 72 degrees all year round. Crystal River is 70 miles north of Tampa, the epicenter of manatee-watching.
Glass igloos in Finland to sleep under the northern lights. Hotel Kakslauttanen's Igloo Village in northern Lapland. Their 20 glass igloos have thermal panes that keep the digs warm and prevent frosting.