Orbrium Secret Mine Tunnel Wooden Fits Thomas Wooden Railway System Brio Chuggington Melissa & Doug Imaginarium Set Toys Engine go up the hill then a quick drop to the bottom!! Tunnel is made tall and wide to accommodate most engines and train cars. Very detail, decorated with limestones wall, flowers, grass field, and an abandoned truck. Includes an ascending track for your engine to go up the tunnel. Compatible with Thomas Wooden, Chuggington, Brio Railway System, and other major brands.