One of America's most beautiful boulevards, tree-lined Monument Avenue is the only street in the United States that is a National Historic Landmark. It runs through the heart of Richmond's historic Fan District and was originally built as an extension of Franklin Street (already an established neighborhood) toward the Lee Monument. The avenue eventually became a sought after neighborhood and continued west over many years following the placement of new monuments along the street. The type and style of architecture seen in the homes, churches and apartment buildings that line the avenue range from English Tudor, Colonial, Georgian, Spanish, Jacobean, Beaux Arts to Italianate. The avenue stretches into Henrico County and ends at Horsepen Road running five miles in length. Monument Avenue has a wide, two-lane street on both sides of the generous median, going east and west.