100 Underwater Wilderness Locations

This is a collection of 100 different wilderness locations that can be dropped into a setting to enliven a journey. The locations are of many different types, from large to small. Each location has been named and is described, and many could have potential adventure and encounter hooks as well.

All the locations are in intended to be underwater, with flora and flora appropriately suited to the location.

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• Hungering Graveyard: This section of the ocean floor is covered in the corpses of sea monsters of many different types, varying from the just deceased to the long dead and skeletal. The oldest remains are buried beneath the sediment on the sea bed. Sea monsters seem to travel to this graveyard for some reason, where they die. The name comes from the belief that this attraction is not natural, and something in the region hungers for sea monsters, luring them to the graveyard to die.
• Impossible Tablemount: This flat-topped underwater volcano does not penetrate the ocean's surface, when viewed from above, yet when viewed from the sea floor it appears to stretch far higher than it should. Those descending onto the tablemount from above are easily able to do so, yet those who try to come at it from below are never able to reach the summit, which appears to constantly recede into the distance, no matter how far is travelled, even if the distance travelled means that the ocean's surface should have been broached.
• Infernal Reef: An oval platform reef of coral a mile across growing on a continental shelf, this is avoided by most creatures in the area. The reef glows with a sullen red light and the surrounding water has a strong brimstone taste to it. Flora and fauna found in the area often has a fiendish taint to it and its thought that the reef has grown around a portal to the Hells, the source of the taint and the glow. No true fiends from Hells have been found in the region and it’s believed that the reef itself blocks the portal, preventing creatures from getting through.
• Iridescent Plain: Located far below the ocean's surface, an abyssal plain would normally be dark, yet this one sparkles with points of iridescent light and can be seen from afar. The local sea life has adapted to the, for an abyssal plain, unusually high levels of light. The motes of iridescence blink on and off in seemingly random patterns, yet when the plain itself is approached closely, it proves to be impossible to close in on the iridescence, which always blinks out when approached.
• Lair of the Aquatic Ogre: This underwater network of caves burrows deep into the rock. It was the lair of a feared aquatic ogre, one who terrorised the surrounding seas both above and below the surface. The ogre had many followers, most through fear, giving them a large army. Many years ago, an expedition was sent to deal with the ogre. Although the expedition's members did not return, the ogre hasn't been seen since and their followers have dispersed. It's assumed that the ogre and the expedition's members both died during the confrontation.

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