Exiting through doors at the other end of the passage, they advanced onto another bridge, which led them to an array structure with nine separate pathways snaking out in different directions beneath an enormous glowing dome, all of which sat at the bottom of the center of the lake. Inside, the dome housed an ornate temple, almost empty, except for a lone henge in the middle.
“Týr’s temple. Built with help from the giants, and great Týr used it to travel the nine realms in his efforts to keep the peace between them,” she said.

God Of War - Midgard, Ch 17