Low level (21 - 24) free teleport to Darnassus via Dungeon Finder

[Atris]

More bug than exploit.
Queue for Blackfathom Deeps and kill the end boss Aku'mai. Then the dwarf Morridune spawns near the Altar of the Deeps and if you talk to him, he will teleport you to Darnassus. Then you can leave your group and you will stay in the city. Works for Aliance.

[huurka]

Not a bug or exploit, but a tip.

[Atris]

Not a bug or exploit, but a tip.

Dungeon Finder could teleport you back, but maybe it working as intendetd.

[SkeletozDance]

good work!

[Aldun]

I cant think of a single occasion that this way is quicker than normal travelling..

[Gehen]

More bug than exploit.
Queue for Blackfathom Deeps and kill the end boss Aku'mai. Then the dwarf Morridune spawns near the Altar of the Deeps and if you talk to him, he will teleport you to Darnassus. Then you can leave your group and you will stay in the city. Works for Aliance.

Neither bug, not exploit (unless it worked for Horde).
There are a few quests for the dungeon that you turn in in Darnasses and this was Blizzard making it easy to get back when you didn't have any mount (back then mounts were first at level 40).

[baichii]

Not an bug or an exploit non the less free teleport to darnassus

[Kitsuji]

Yeah, its obviously working as intended, but still, its worth leaving up here if you maybe are stuck in the Badlands, with a Hearthstone in the bank, and need to get to Darnassus in 30 minutes.