You’ve heard of concept cars, but how about concept construction vehicles? Builder Pierre E Fieschi built just that with his slick, orange Liebherr Tunnelier. This tunneling powerhouse looks capable of boring some serious holes, perfect for starting your own subway system or mineral excavation. I love the modern look of Pierre’s model, which features tread links around each individual wheel as opposed to a continuous tread along each side. If this isn’t enough Liebherr for you, be sure to read our review of the LEGO Technic Liebherr R 9800 Excavator!