01.04. - 31.10.2025 Mullerthal's living geologic past Challenge

Part of the UNESCO Global Geoparks network, Luxembourg’s Mullerthal is a favourite amongst nature-lovers for its stunning sandstone formations, gorges and waterfalls. For those with a trained eye, its features reveal not only fascinating geomorphological processes but also how geology has played a key role in the region’s development.

Participate in challenge: 25

Visit of the site: 100 

Challenge completion: 75