From the Hero Games website:
SECRET LANDS OF DANGER
The Champions Universe contains many places and races hidden from the sight and attention of everyday people. Whether they’re benevolent or evil, each of them may create peril or trouble for your heroes.
Hidden Lands covers:
* the fabulous undersea realm of Atlantis, ruled by wise Queen Mara but with many people who may one day threaten the surface lands
* the utopia of Arcadia, located deep in a temperate valley in Antarctica, home to a powerful, immortal race called the Empyreans
* the lost empire of Lemuria, which sank beneath the waves long ago due to its own evil and hubris, but which is now poised to pose a greater threat to the rest of the world than ever
* other strange and secret places in the Champions Universe, such as Shamballah, Agharti, the Well Of Worlds, Beast Mountain, and Sunday Pond
Featuring dozens of new characters, even more adventure ideas, and tips and rules for creating characters from these races, Hidden Lands is the perfect way to expand the scope of your Champions campaign!