North Dakota: Fort Union Trading Post

historic Fort Union Trading Post interior and native american teepeeZack Frank/Shutterstock

This landmark, erected in 1828, was one of the most important trading posts (and the longest lasting) on the upper Missouri River when it was still in operation. Run by the American Fur Company, it saw plenty of famous faces from John James Audobon, famed naturalist and painter, to Prince Maximilian, who used the post to trade guns and ammunition for grizzly bear and bison furs from the Native Americans.

Ohio: Cincinnati Zoo

Cincinnati ZooJohn Minchillo/AP/Shutterstock

When it comes to zoos in the United States, Cincinnati’s is a contender for king of the jungle. That’s because it has the oldest continuously operating zoo building. The limestone dome, built in 1875, used to be the Monkey House but has since become the Reptile House, home to all sorts of snakes, lizards, and turtles. Adults and kids alike will love marveling over the architecture… and the animals, of course.

Oklahoma: Honey Springs Battlefield

Honey Springs BattlefieldJeffrey M. Frank/Shutterstock

On July 17, 1863, the largest battle in Oklahoma’s history was fought. The Battle of Honey Springs during the Civil War, one of the few that took place in Indian territory, was won mostly due to the First Kansas Colored, which was the first African-American regiment in the Union army. Stroll one of the six walking trails that now wind through the battlefield with informative signs mapping out the battle along it. Here are the most amazing military battle re-enactments around the country.