Book excerpt: Dedicated exclusively to the oldest town in Kentucky, Postcard History Series: Harrodsburg and Mercer County presents what Fort Harrod looked like when it was established in 1775. High Bridge, spanning the Kentucky River between Mercer and Jessamine Counties and only miles from Shakertown, was an engineering wonder of its age. As the highest railroad bridge in the world at the time, it was the subject of hundreds of postcards. Summer visitors came from all over the country to enjoy Harrodsburg's Graham Springs Resort, known as the "Saratoga of the West." Views of nearby Dix Dam and Herrington Lake were made into postcards for vacationers to send to their friends and family.