Dragons' Den is a medieval world occupied by a mixture of humans in villages and talking dragons - good and evil alike. The villainous Dragon Lord, who has tried to take over the land both on his own and with the help of Mother Brain, resides on this world. The world appears in two episodes and is referenced in two others.
- "Three Men and a Dragon" - The bulk of the episode takes place on this world. Mother Brain gives Dragon Lord a hypnotic crystal he uses to turn all the good dragons on the world evil. The N Team heads to Dragons' Den to rescue the last good baby dragon and stop Dragon Lord. Ultimately they succeed, using magical lightning to restore the dragons to the side of good.
- "The Trojan Dragon" - Dragon Lord has his servants steal the Sun Stone, which powers the Palace of Power. The N Team heads to the world to stop his plan and get the Sun Stone back, and discover that the true nature of his plan involves awakening a gigantic, pure-evil golden dragon. The N Team visits Hyrule to build a fake dragon to infiltrate Dragon Lord's domain, and ultimately manage to trick him into destroying his diabolical creation.
- "I Wish I Was a Wombatman" - The world does not appear in this episode, but a reference to it is found in a Dragons' Den-themed area of the studio world, which includes a fire-breathing Dragon Lord animatronic.