Currently there are seven different continents within the Idle Miner Tycoon world. Each one gives you a different currency!

These are:

Grass Continent
Ice Continent
Fire Continent
Dawn Continent
Dusk Continent
Ancient Continent

Lost Desert Continent

Additionally there is the Mainland, where you can earn Gems to use with Super Managers. Then there is also the Event Mine island, where time-limited special mines appear!

Finally there is the infamous Impossible Island, where only the bravest may enter.