Walking tour.
The "Royal Route" - that was the name of the route from the Florian Gate, the front gate of the city, to the Royal Castle on Wawel Hill, all royal motorcades drove along this route, crossing the city from north to south.
Nowadays it is a tourist route: the Church of St. Mary, the Market Square with the Passage Rows of Sukiennica, the University Quarter, the Franciscan Monastery, St. Peter and Paul's Cathedral and finally Wawel Hill itself with the Cathedral. 
Excursion is provided in 6 languages : English, German, French, Italian, Spanish, Russian.  

Itinerary:

Barbican and the Old Town Walls, St. Florian’s Gate, Planty Park
Czartoryski Museum – “Lady with an Ermine” by Leonardo da Vinci
The National Theatre
ul. Szpitalna – the Eastern Orthodox Church
Small Market Square (Mały Rynek)
pl. Mariacki – St. Mary’s Church
The Main Market Square (Rynek Glowny) – Adam Mickiewicz Monument, the Cloth Hall - Sukiennice, St. Adalbert’s Church, City Hall Tower, Eros bendato – contemporary artwork by Igor Mitoraj, Statue of Piotr Skrzynecki
University Quarter – Collegium Maius, Collegium Novum, Statue of Nicholas Copernicus
Fryderyk Chopin Monument
The Bishop’s Palace – John Paul II
Franciscan Church – Stained Glass Windows by Stanisław Wyspianski
The New City Hall and Wyspianski Pavilion – City Information Centre
ul. Grodzka – St. Peter and Paul’s Church, St. Andrew’s Church
ul. Kanonicza – the oldest street in Krakow
The Wawel Hill – Tadeusz Kościuszko Monument, the Cathedral (without entering), the Royal Palace (without entering), the River Vistula Panorama
The Dragon of Wawel.

Meeting point: in front of the entrance to the Barbican (ul. Basztowa). The entrance is located opposite the Florianska Gate (Brama Floriańska)(click to go to the Google maps)
The guide with the "excursions.city" sign. 
Endpoint: Wawel Hill
Length: 3 km  
Duration: 3 hours