The River Olung is a major waterway in Chult that serves as an important geographical and strategic boundary for the peninsula. The river originates from Lake Luo, where geothermal vents and volcanic lava heat the water to boiling temperatures. As the steaming-hot water tumbles down rapids and low cataracts, it cools quickly and loses most of its alkalinity, becoming safe for navigation and fishing.
Geographic Significance
The River Olung flows from Lake Luo northward, eventually emptying into Kitcher’s Inlet on Chult’s eastern coast. The river is recognized by guides and explorers as a crucial boundary: territories to the east are considered “normal” jungle, while lands to the west are classified as undead territory. This distinction makes the river an important navigational landmark, and some expeditions specifically choose to enter the peninsula through Refuge Bay to access the river.
Strategic Importance
The river provides access to several significant locations:
- Kir Sabal: The ancient aarakocra monastery is visible from the River Olung through occasional breaks in the jungle along the eastern bank, though its cliffside structures remain difficult to reach from the ground. The aarakocra of Kir Sabal hunt and fish along the river.
- Kitcher’s Inlet: The river empties into this shallow bay, which provides access to the ruins of Port Castigliar and Mezro
- Mezro: Water from the River Olung flows over the ancient wharfs of these flooded ruins, turning the streets into canal-like waterways
- Nangalore: A tributary of the river floods right up to the entrance of this cursed garden, making it easily accessible by boat (though traveling by foot through the surrounding boggy marsh is treacherous)
Notable Features
The river passes through diverse terrain, from the volcanic wastelands near Lake Luo to jungle regions where it serves as a fishing ground for local communities. One expedition chronicled in Devlin’s Journal describes the Company of the Yellow Banner making landfall at Kitcher’s Inlet and following the River Olung to Lake Luo before cutting southwest into the jungle toward Omu.