There is no station in Bragança now but express buses run from Braga, Porto and other cities. Twice a week there is a bus from Zamora in Spain - no web address so phone either bus station for details.
Walking wil be easy for most but it's possible to get a taxi up to the Cidadela for those who find the short but steep hill daunting.
The town is pleasing and there's a good museum in the main street but bragança's main claim to fame lies in the Cidadela, virtually a separate village above the town and one with a distinctly medieval flavour. There are three particular sights here.
Montezinho national park
local souvenirs/ceramics,wick baskets.
There's a very good restaurant in the Cidadela area.
local mineral waters;port(Douro)wine.
Miranda do Douro;Miranda de I Douro in mirandese language. Chaves,an historic city traversed by the bucolic Tamega river.There`s a brand new casino in Chaves. Vidago-Salus & Pedras Salgadas(spa towns)WikiPedia:Bragança (Portugal)