The main sightseeing destinations for those vacationing in Sorrento are the mega attractions of Pompeii and Mount Vesuvius and to a lesser extent Herculaneum, Naples and Amalfi/Positano.
You will find plenty of traditional tours offered to these places by your hotel or travel agents in Sorrento. You can also visit all these independently with ease using the Circumvesuviana train service or the local Sorrento public bus services.
In Sorrento itself there are several sightseeing options you will regularly see during your stay in the summer season covering Sorrento and the local peninsular.
These are:
The bus is exactly the same as the open top sightseeing buses operating in nearly every major tourist city nowadays. Here in Sorrento the offering is slightly different. The same hop on and off principle applies, you can board and get off as many times as you like at any of the six stops around the Sorrento peninsular for 24 hours of sightseeing.
Three of the six stops are in Sorrento and Sant'Agnello, the other stops in the peninsular villages of Massa Lubrense, Termini and Sant'Agata.
The alternative to the hop on bus is just to use the SITA local buses that cover the same villages from Sorrento.
From April to October there is an alternative to the crowded public SITA buses that ply the most bus route from Sorrento along the dramatic south coast to Amalfi.
City Sightseeing who operate the open top sightseeing buses in Sorrento also operate a scheduled service between Sorrento and Amalfi stopping at Positano in direct competition with the SITA bus.
The service broadly runs at an hourly frequency and is scheduled to take around 90 minutes to do the whole trip.
You pay a premium over the public bus service. This is not a hop-on hop-off service but has a commentary.
This a straight forward novelty orientation tour of Sorrento covering most of Sorrento and Sant'Agnello in a short 30/35 minute tour from Piazza Tasso.
You do get a commentary available in 7 languages via headphones. You'll cover most of the town including down to the port and it's a good introduction in a short time to Sorrento.
The Sorrento Tram is a longer version of the Sorrento city train. The more robust vehicle, really a normal vehicle with a body made to look like a tram allows the tour to go at a higher speed and extends the tour along the coast road out to Massa Lubrense.
It is also guided so will give you a bit of the local history of the area along the way.
The blue SITA bus local services links Sorrento with outlying villages on the peninsular. Timetables require study and can be erratic but are well worth the effort to get out and about and visit the villages and experience the network of walks between villages through the lemon groves that are delightful.