Dragon Island

The Dragons' Nest is the supposed home of all dragons in the film version of How to Train Your Dragon. It is said that the Vikings of Berk have been searching for the Nest since before they settled on the islands.

Description
The Nest is located on an island assumed to be far off from Berk (it shown to be on the corner of the Vikings' maps). There is a perpetual heavy mist that enshrouds the sea in the surrounding area, preventing anything, save for a dragon, from finding it. The Vikings, under the leadership of Stoick the Vast, are supposedly the first generation of Viking to be able to find it.

The island itself is simple in geography: it comprises jagged rock structures jutting out of the waters, a beach of gravel, and one, sole volcano. Once one bypasses the mist, the chunks of stone scattered about prove to be more than enough of a challenge for most Vikings to navigate through safely, as well as anything else without thorough knowledge of where to go. The beach itself is peculiar in that, rather than being covered in sand, it is composed primarily of what appears to be pebbles. As a result, contact with the ground on the island of the Dragons' Nest is amplified rather than muffled as it would be with normal sound, often tipping the inhabitants of the island to any intruders. When Stoick the Vast jumped onto the island, all dragon activity seemed immediately stop. Lastly, the volcano of the island, which, from the base, appears to be nothing more than a mountain, provides the physical structure of the Dragons' Nest. Along the caverns and tunnels that wind around the periphery and inner layers of the volcano live almost all dragons. Within the pool of lava in the center, however, lives a Seadragonus Giganticus Maximus known as the Red Death. Dragons have been long known to gather food, from the Vikings or otherwise. However, it was only recently discovered that the food is delivered to the mouth of the volcano so that the Red Death may feed. Any dragons that bring back a particularly small catch or nothing at all are eaten by it.

Trivia

 * It is interesting to note that, although the Red Death is initially depicted to live bathed in lava, when it later breaks its way out of the mountainside to face the Vikings, the lava is nowhere to be seen.
 * The Dragons' Nest does not itself exist in the How to Train Your Dragon book series, though it has a counterpart in Wild Dragon Cliff. However, no Seadragonus Giganticus Maximus is known to live there.