Sarnico's Medieval structures can still be found, although you'll have to look for them.
The most obvious is the 'tower house' in the main picture, on Via Parigi (and signed within the town centre).
But keep your eyes open for other clues: stone windowframes set low down (streetlevels have risen since Medieval times), ancient wooden beams, covered passageways, the odd coat-of-arms over a doorway (although several of those I saw were modern reproductions).
Sarnico does have a very pleasant riverside and lakeside walk, which I imagine is a favourite for the evening passegiata (certainly there are plenty of gelateria along its route!).
The river Oglio has numerous swans and moorhens and ducks, there are numerous boats moored at the confluence of river and lake, and a boardwalk over the water extends onwards (I stopped and soaked up the sun on one of the convenient piers which extend into the lake).
A quiet and really rather lovely spot to wander. It's flat and easy for those with mobility difficulties.
16 Reviews and Opinions
PIAZZA O BESENZONI 1, Sarnico, BE 24067
Good for: Families
It is very easy indeed to take a bus from Bergamo's bus station (opposite and to the right of the railway station) to Sarnico. Journey time is around an hour, fare was about 3.50 euro one-way in June 2012 (I think...can't remember exactly).
You'll need to buy your tickets from the glass-walled bus station building and remember the validate (date-stamp) them when you enter the bus. Then you will need to ask which stand the bus leaves from or just walk through the bus station checking each one until you see 'Sarnico' mentioned.
There is more than one 'Sarnico' stop, but the best for the town centre and lakeside is 'Municipio'. Buses usually have an electronic display giving the next stop ('prossima fermata Sarnico Municipio') but if the one on your bus isn't working (mine wasn't) it is exceptionally easy anyway, because the bus goes round an island and stops before leaving the town. You will, in other words, catch the bus back from the same place as you got off (make sure you catch the bus going to Bergamo and not to Lovere!).
The bus stop is outside the Municipio (town hall), which has a tiny 'information' office and...most importantly...toilets (the squat type). Ask at the information office for those inside the building (the toilets are downstairs and shared between both genders) or walk carefully to the back of the building, where the car park is, and you will find another toilet.
You can find the timetables for buses Bergamo >Sarnico (and elsewhere) on the link below, under 'linea extraurbane'> 'orari'.