As one of the most intact relics of Krakow’s medieval defenses, the Great Barbican features on almost all city tours. See it on a Segway, electric-cart, scooter, or bike excursion that stops outside for a guide to point out its historical and architectural highlights—insight you probably wouldn’t get if exploring alone. For a more in-depth look, choose a private walking tour that includes time to go inside and roam the barbican’s courtyard, galleries, and passageways. Other options include buying an admission ticket for a self-guided tour or purchasing a Krakow sightseeing card that provides access to the barbican and other key Krakow sights for one low price.