The Underhalls were a series of water tunnels on Earth that facilitated access between the Entryway facility and the Gantlet. Like the Entryway, this site appeared to be constructed by the UAC.
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The Underhalls were a series of water tunnels on Earth that facilitated access between the Entryway facility and the Gantlet. Like the Entryway, this site appeared to be constructed by the UAC.