Zeppelin

From wow.incgamers.com

The goblin engineers of Azeroth created great mechanical flying machines, capable of transporting players between locations on different continents:

• Grom'gol Base Camp to Orgrimmar
• Grom'gol Base Camp to Undercity
• Orgrimmar to Grom'gol Base Camp
• Orgrimmar to Undercity
• Undercity to Grom'gol Base Camp
• Undercity to Orgrimmar