 A privately owned observation tower and neighboring two-story building were built on the summit in the late 19th century, but seem to have been removed sometime around state acquisition of the property two decades later.Attention paid to the mountain dwindled, and even today it has no officially maintained trail over its summit, though the "unofficial" Twilight Trail remains well-used and is blazed along most its length.In 1921 both High Peak and Round Top were added to the Forest Preserve.