Obviously, Pisa is the home of one of the world's most famous landmarks, the famous Torre Pendente or Leaning Tower. This does attract the attention, and a climb up it is well worthwhile, despite the steep admission price (€15, or €17 if booked online in advance). Yet this is not the only attraction in the immediate vicinity. The cathedral precints, in which the campanile is set, is a harmonius and elegant confection of pale marble. The setting of the entire area is even more stunning than the delicate tower in isolation - though it is often crammed with tourists posing for the camera by doing the 'Holding Up The Tower' position. The Piazza del Duomo is a UNESCO World Heritage Site. However it is better known by its alternate name: 'Piazza dei Miracoli', 'The Square of Miracles'. It was Gabrielle D'Annunzio, the one-eyed syphalitic poet who quixotically seized the port of Fiume in Italy's name in 1920 (against the wishes of the Italian state) who first used this phrase, and it fits. Other Italian cities have a Piazza del Duomo; only Pisa has a Piazza dei Miracoli.
The straight lines of the Duomo itself are also worth an investigation, though the bizarre Baptistery, a barbarous crown at the far end of the cathedral, can be safely missed in my opinion. The classical cloisters of the Camposanto to the north of the square are also refreshingly elegant, and they harbour three magnificently insane frescoes by Buffalmacco, all jam-packed with incident and detail.
Two museums flank the square. The Museo dell'Opera del Duomo is more engaging than I first expected, and I would recommend a visit prior to entering the Duomo or Camposanto, to help you make some sense of what you will see. The Museo del Sinopie is devoted to the red outlines of frescoes discovered during renovation. I gained nothing here. It might be a useful stop for someone studying art history, but I was in and out in five minutes. Its one highlight is a 3D computer display of the Camposanto cloisters - don't forget to put on 3D glasses, or you will get a horrific headache trying to make sense of it.
The remainder of the city of Pisa lies to the south of the Piazza. The Piazza is in many ways isolated out by the north-western gate. Its location is puzzling until you realise that the square was once bounded by the River Auser, a tributary of the Arno, on two sides. Pisa's sheltered harbour was hence located nearby, and the Piazza del Duomo was as grand a frontispiece for the proud people of this maritime city as was the Piazetta for Venice. The Auser now no longer runs past the Piazza, and the sea has retreated several miles since Pisa's heyday in the 11th-14th centuries.
Quick Tips:
There is a confusing array of tickets for the buildings that make up the Piazza dei Miracoli. I ended up paying €25 - 15 for an ascent of the Tower, 10 for access to the other five sites (Duomo, Baptistery, Camposanto, Museo dell'Opera del Duomo, and Museo del Sinopie). Here follows my opinion of what you should actually pay for, and perhaps more importantly, what you should not.
Firstly, €15 for a half-hour climb up the Leaning Tower is imperative. Groups ascend in 30 minute blocks, and you have to be slotted in to the next free one. Turning up at 9.30 on a weekday morning in March I was able to be put in to the 10:00 slot. Arriving later in the day at Easter or in summer you may be unlucky. Booking online 15 days in advnce for €17 may be recommended - see http://boxoffice.opapisa.it/Torre/index.jsp for details.
For the other five sites, you can buy a ticket allowing access to one (€5), two (€6), or all five (€10). In my view the Museo del Sinopie and Baptistery can be ignored, so specify a two-site ticket for the Museo dell'Opera and the Camposanto for €6. You can then get an extra ticket to allow access to the Duomo itself - this is €2 from 1st March to 31st October, and free through the winter. So you get access to the three good sites for a mere six or eight euros, as opposed to the ten I paid.
The monuments of the Piazza dei Miracoli are open from 9.00 to 18.00 in March, 8.00 to 20.00 April - September, 9.00 - 19.00 in October, 10.00 - 17.00 November to February (except for 25th December to 6th January when they extend the opening time by one hour either way). See www.opapisa.it for more details.
One other cost-saving tip I would make is not to buy ANYTHING froma vendor around the square. Head back into the town and prices drop dramatically. For example, postcards were for sale at €0.80 each around the Piazza; exactly the same cards were on sale in newsagents on the Lungarno beside the river Arno to the south for only €0.30.Best Way To Get Around:
For Europeans Pisa is probably easier to visit than Florence. Florence has the larger airport, but the dinky little Aeroport Gallileo Galilei in Pisa has boomed recently by becoming a hub for budget airlines. From the UK alone flights head to Pisa from four or five regional airports using low-cost carriers such as Ryanair and Easyjet. I flew to Pisa from Liverpool (a mere £18.81), and flew back to London Stansted (£31.86). Terravision coaches to Florence connect with Ryanair flights, but it seems a shame to miss out on Pisa. And certainly if you fly from Liverpool you end up landing after dark, so a night in Pisa makes perfect sense.
The airport is located just south of the city (you can see it from the top of the Leaning Tower),and buses run the route regularly, though they seem to stop in the evening. Rather than paying for a taxi upon landing, head right to a kiosk where you can buy train tickets to Pisa Centrale for €1.10. Though I admit I was a bit nonplussed in waiting 40 minutes for the next train, only to discover that the ride only takes about three minutes. Trains also run regularly to Florence from both Pisa Centrale and Pisa Aeroporto. From Centrale to Florence cost me €5.70 from the fantastic easy-to-use automatic machines that Italian stations all seem to have, and the journey takes around 1 hour 20 minutes.
In Pisa itself, unless you ahve mobility problems, walk. From the station on the southern edge of town to the Piazza dei Miracoli on the very northern edge takes around thirty minutes at a leisurely stroll, giving you plenty of time to take in your surroundings. If you head straight north up the Corso Italia, cross the Arno, then up the Borgo Stretto you cannot fail to see the signs directing you towards the Leaning Tower.
You can 'knock off' Pisa in four hours this way - thirty minute walk each way, and three hours around the Piazza.