^{Photo Credit: Bike Nomad}

Feel the adrenaline rush of a mountain bike ride through the abandoned tunnels of the Mežica Mine under Mount Peca.

If you’re an experienced mountain biker looking for a technical trail, Slovenia’s Black Hole Trail might be for you.

The Black Hole trail is the world’s only underground enduro trail. For 6 miles (10 km) you’ll descend over 460 feet (140 meters) by riding through 5 levels of the former mine.

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