Equestria is a kingdom ruled by Princesses Celestia and Luna. Within the kingdom's confines are various regions: Ponyville, Canterlot, Cloudsdale, the dangerous Everfree Forest. There are TONS of creatures in Equestria. Caves with dragons, tons of trees, and more.
Twilight, I can't help it! Someone needs to help Twitterponies Wiki by adding more information.