In September 2007 Tangun was enlarged and vastly changed. It is now the size of a whole kingdom and devoted exclusively to training new gamers. Anyone who is higher than level 50 can enter if they pay a fee of 10,000 coins to the inn assistants. Tangun is a place reserved for new gamers to learn how to play while providing them with an opportunity to meet others and safely gain experience and riches before riding the Winds. When a player reaches level 50 their life as an adventurer changes for they are ready for bigger challenges but until then, Tangun is their haven.

Tangun is an area where very young adventurers can learn how to play in safety. You can learn how to hunt, gather items, trade with NPCs, perform quests and how to create items such as a lantern.

If ya don't want to waste time explorin' take a gander at this:
Tangun Locations

If ya want to know about all the quests here look this over:
Tangun Quests