Vyšehrad is a highly recommended attraction by travelers on Tripadvisor. It is a fort located a ways from the main center of the city, but it is no further than a 20-minute metro ride and a 15-minute walk away from the Vysehrad station. Since it is removed from the main touristy areas of Prague, many people enjoyed the quiet and scenic walks along the fortress walls.
Views of the River from the Fortress
I know little of the history of Vysehrad, but I agree that it is a fine and beautiful place to visit. I am not sure if I would recommend this place to others, but we had so much extra time in the city, it was an okay diversion.