http://www.slate.com/articles/life/travel_explainer/2015/08/_world_s_biggest_roadside_attractions_a_history_of_world_s_largest_tourist.html

If you’ve spent much time making long road trips across America, you’ve probably noticed that its highways are dotted with “world’s largest” attractions: oversized replicas of ordinary objects meant to entice travelers to pull off the road. When did enterprising businesses start building these tourist traps? What was the world’s first “world’s largest” roadside attraction?