30 Meters Down: Brian Grubb eFoils the Shadows of Bluespring Caverns
Two-time world wakeskating champion, Brian Grubb, rides an e-foil at 20 miles per four through America’s longest navigable underground river.
The Myst’ry River is 30 meters beneath the surface. The temperatures hover around a consistent 53 °F (11 °C).
The world’s first underground e-foil expedition required complex logistics.
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