When John Henry Twachtman visited Yellowstone National Park in 1895, he was shocked by its natural beauty. “This trip is like the outing of a city boy to the country for the first time,” he wrote. “I never felt so fine in my life.” While artists had been making scenes of Yellowstone’s geological wonders for decades, Twachtman took an innovative stylistic approach, cropping the waterfall and using a bright palette and spontaneous brushwork to express the energy and freshness of the landscape.