The US Army developed a series of massive land trains in the 1950s to transport supplies to remote areas in the Arctic. The trains, designed by R.G. LeTourneau, were capable of hauling hundreds of tons of cargo over long distances and were used to construct the DEW Line, a series of radar stations in the Arctic. The land trains were eventually replaced by heavy-lift helicopters, which were more efficient and cost-effective. The remains of some of the land trains can still be seen today, including one that is visible on Google Maps.