Grubenfieber at the Schaubergwerk Morassina in Saalfeld/Saale, Thüringen, Germany, is a hands-on underground expedition that takes you off the visitor path and deep into historic Alaunschiefer workings. The guided, 2½-hour tour drops you through a roughly six‑meter abseil into the mine’s lower levels, then threads you through tight galleries, original timbering and layered stopes across three distinct Sohlen. It’s a caving experience that favors mobility, steady footing and a taste for confined spaces. Helmets and headlamps are provided; the route is raw—narrow tunnels, damp rock, and sections that require bending, scrambling and staircase-style descents rather than wide promenade paths. Along the way, miners’ marks, stamped supports and tool scars tell the story of former alum-shale extraction. That industrial archaeology frames the finale: vividly colored stalactite and flowstone formations in illuminated chambers, some of the most photogenic speleothems in the site. This is an appealing option for travelers who want more than a show mine’s easy loop. Grubenfieber feels exploratory; you follow the traces of historic miners and experience the mine’s verticality across three levels. Guides manage the technical moves, but the trip expects participants to be physically agile—minimum age 14, limited group size, and no wheelchair access—making it a focused adventure for fit visitors and families with older teens. Practical details matter underground: arrive 15 minutes early to check in at the visitor center with your QR confirmation, wear sturdy, closed-toe boots with good tread and clothing that can get dirty. Expect cool, damp air and sections of low light where your headlamp becomes the primary viewfinder. The operator emphasizes that entry is at your own risk and that protective gear is mandatory. Beyond geology, the site offers a compact history lesson in industrial mining techniques; the mine’s Alaunschiefer deposits once supported local economies and left visible marks in the rock and timber. Conservation is straightforward—stay on the guided route, don’t touch fragile formations, and follow guide instructions to protect microclimates. If you’re after an intimate, hands-on subterranean adventure in central Germany, Grubenfieber delivers: claustrophobic passage, miner-made architecture, and a finale of colorful stalactites that make the descent worth every cramped, muddy step. Small groups—typically capped at 10 participants—keep the descent personal and let guides explain historical details intimately. The 2.5‑hour itinerary balances steady movement with interpretive stops: you won’t rush; guides pause at original stempelsetzung, describe mining methods and point to mineral stains that tint the speleothems. Sensory cues are distinct: water drops, a faint iron scent and cool, constant temperatures underfoot. Photographers should plan slow-shutter shots and a tripod. For thrill-seekers, the tight squeezes and the six‑metre abseil are the payoff. Book early—spaces fill quickly and the route suits small, agile groups. Wear durable clothing you can wash.