The Savage Land and Pangea were a pair of deep valleys hidden in the Palmerland penninsula of Antarctica. They were tucked deep within the volcanoes of the Eternity Mountain range. The Savage Land was created 20,000 years ago as a biological laboratory and testing ground. It is unknown who was behind the experiment (extra-terrestrials, Eternals and Deviants seem likely). The results of their experiments survived to the present day. These include recreations of formely extinct species like the dinosaurs.
The experimental area had been abandoned when it was rediscovered by pre-cataclysmic Atlanteans and settled as a colony. The Atlanteans repaired the environmental machinery left by the builders, then used it to increase the habitable land to include the valley they called Pangea. The Atlanteans used Pangea as a resort and amusement center. The Atlanteans discovered how to use the builders' devices to mutate the local natives into a variety of demihumans, such as fish-people, bird-people and so on. These demihumans were used as laborers. Later, the Atlanteans made the machinery self-maintaining and the demihumans were set free to settle the unused sections of Pangea.
With the destruction of Atlantis, the survivors were left on their own. While their civilization survived, it slowly regressed to a barbarous level. A later plate shift dropped Pangea below sea level and cut it off from the Savage Land.
In the 20th Century, the Savage Land was rediscovered by Lord Robert Plunder, a British scientist and explorer. He discovered a vein of "Anti-Metal," a Vibranium isotope that destroys molecular bonds and reduces substances to their component elements. He shared the knowledge with his two sons, Kevin and Parnival. When criminals sought the location of the Anti-Metal lode, Robert and Kevin fled to the Savage Land. Robert was soon killed, but his son survived to grow into the jungle hero called Ka-Zar.
In more recent years, the Savage Land and Pangea were increasingly involved with the modern world. Magneto rediscovered the builders' mutating device and used it to create a team of artifical mutants. Finally, the worldwrecker, Terminus, discovered the hidden valleys and destroyed them as a test of his destructive abilities. Only Ka-Zar and his wife, Shanna, survived the catastrophe. Terminus was later destroyed and his armor still remained there. While the builders' environmental machinery was disabled, it may still be repairable.
Inhabitants of the Savage Land:
Ka-Zar
Shanna the She-Devil
Zabu
Tongah
Sauron
Savage Land Mutates
Garokk
Zaladane
Devil Dinosaur and Moon Boy
Stegron the Dinosaur Man
Kraven the Hunter
Skaar
Races of the Savage Land:
The Fall People
The Aerians
The Tree People
The Tubanti Fish-People
The Lizard Men
The Cat People of Pandori
The Man-Apes
The Lemurans
The Pterons
The Sun People
The Swamp Men
The Zebra People
The Hauk'Ka