New Albin's Old Iron Marker: The Iron Post

Welcome to New Albin, Iowa, where you'll find the Iron Post, a 54-inch strongsummary of historical charm that's nearly as old as your granny! Twitchy oxen hauled it from Wisconsin to Iowa back in 1849, under the watchful eye of Captain Thomas Lee, of the US Army Corps of Topographical Engineers. The US Congress had plotted North 30 minutes as Iowa's top boundary line on August 4, 1846. The Iron Post became a handy, helpful landmark, marking that specific border for all to witness. Known to the world as a National Historic Landmark, it's an unusual glimpse into the 19th-century map-making tactics of the USA. Each face of this obelisk boasts engravings: 'Iowa', 'Minnesota', '1849', and '30 degrees'. Just like the zany ways of Iowans on the Fourth of July, isn't it?

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons