I recommend that you get off the tram at the obelisk. The obelisk dates back to 1830 and was erected in honor of a visit of the Emperor Franz 1. of Austria and the new road connecting Trieste with Austria.
From the obelisk start a few walking paths. One goes along the Strada Vicentina to the village of Prosecco which is about 6 km away. The area is also good for cycling and there is an information panel hanging there.
Since the obelisk is located at the edge of the ridge above Trieste you will have a great view on Trieste and further afield and across the sea.
If you walk from the town center along the Strada per Vienna towards the Slovenian border you will find the Partisan Monument on the left side. I consider it one of the major sights in Opicina. Opicina has a high percentage of Slovenian population.
Along the Strada Provinciale in the center of town you will find a Slovenian bookshop, where you can buy fridge magnets either in Italian or Slovenian, history books, a CD with Slovenian Partisan songs etc.
You will find stamps in the nearby tabacci (kiosk). Don’t try the post office like I did as the lines are endless with people paying bills.
The catholic church dedictated to San Bartolomeo is situated in the center of Opicina. Unfortunately it was closed when we visited. If I deciper the stone panel correctly then it dates back to 1850 or thereabouts.
For me this is the only option as I just love trams. The tram to Opicina leaves in Trieste from Piazza Oberdan. I suggest that you buy a day card (Euro 3.80 in 2012) in the kiosk at the station. That way you can get off also by the Obelisk and enjoy the views of Trieste and the sea. The ticket is also valid on the buses of Trieste and all the way to Muggia.
The tram was introduced in 1902 and used to be necessary to transport the locals. Today it’s a tourist attraction that is heavily subsidised. The future is uncertain with the current economic crises. Let’s hope that this spectacular piece of engineering will keep running.
The tram starts off as a normal tram. A bit further up the line before the steep uphill part starts an additional trailer is added that pushes it up the hill like a cable car. Once up the hill the procedure is reversed and for the last kilometers it's a normal tram line again. Simply unique!
The end station of the tramline features a café and kiosk where you can have a drink/snack, buy ice cream or souvenirs or tickets. There is sitting inside as well as a few tables outside.
Across the street from the tram station on the small square is the bus stop if you want to take a bus to the Grotta Gigante or to Trieste.
The bus line Opicina – Sezana (SLO) has closed down.