Bromine Lake is a lake that is almost a very small inland sea. It is also special for other reasons. It always has the warmth of a living Human, no matter what the season. It is not a hot spring with its sulfuric chemicals. There are hundreds of theories, but no answers.
Even if they did, they would never believe it, as it has ties to the time of legends, to the time of Corvus.
Legends abound in some places about ancient landforms (Islands, Peninsulas, Mountains) that dissapeared long ago in towers of glowing energy. (See Any Unnatainable Glory entries for more info)