ADHORNA has consolidated its position as a front-line company in the manufacture of false tunnels, tunnel entrances, and animal and drainage underpasses. ADHORNA provides its customers with: An engineering department ready to study and implement any project submitted to us. Advanced production methods. Continuous improvement in product quality. At the customer’s request, the process is completed by the shipment, assembly and sealing of the parts involved in the project. The use of prefabricated systems instead of traditional methods for building false tunnels means a significant saving in both cost and assembly time.