Amazon.com: Dechant's Railroad Express Model Train G Gauge/Scale Tunnel Portal | Set of 2 | Made in The USA : Toys & Games
Single train tunnel entrance (tunnel Mk3) from BrickLink Studio
LEGO City Tunnel, Road, & More | Looking Pretty Awesome! - YouTube
Mark Segedie on Twitter: "Working on the landscaping around the tunnel 🙂. . . #lego #legocity #legocitylife https://t.co/67tLrzye1V" / Twitter
Tunnel for Lego Scale Train - Etsy
Amazon.com: dspitwod Train Tunnel Building Toy for Classic Electric City Passenger Express Train Tracks Toys Accessories Railroad Construction Building Block Compatible with Major Brand (Train Tunnel) : Toys & Games
LEGO Train Tunnel Idea - Suggestions and support - LEGO Train Tech - Eurobricks Forums