Alghero is a beautiful destination in Sardinia, Italy. It is best known for its beautiful beaches, very good food at reasonable prices, and its catalan origin, in fact it was known in the past as little Barcelona.
Alghero is serviced by several airlines including:
'Aigua Rent a Car, Aigua Alghero Sardinia, Italy'. 
'Sardinya, Car Rental Alghero Sardinia, Italy'.
There is a station about fifteen minutes walking distance from the center of the town and marina. To get to the town from the station simply turn left out of the station on Don Minzoni, go straight for five blocks or so until you hit the beach and go left along Via Garibaldi. Alghero station runs trains operated by Ferrovie della Sardenia, not to be confused with Ferrovie dello Stato (Trenitalia). These are two separate companies, and you will have to take one of the many daily 35-minute trains from Alghero to Sassari in order to catch a connecting train operated by Trenitalia to another destination such as Cagliari. Tickets must be purchased separately at their respective stations. Ticket price Alghero-Sassari is Eur2.20. Sassari-Cagliari at standard fare second class will run you Eur13.65 each way. No student or age discounts.
There is a direct bus from Cagliari to Alghero. It costs €20 and takes 3.5 hours
The Palazzo d’Albis is a worthwhile historical site.
Don't miss Neptune's Grotto located at Cappo Caccia, a vast grotto reachable by boat trip. However, on bad weather days you can`t take the boat. Hiring a scooter is a fun way of getting there! It takes about 45 minutes, and on the way there, you should stop for lunch at Ristorante La Nuvola (about 35-minute drive from Alghero towards the Cappo Caccia, just on the right side of the road). When you arrive at the Cappo Caccia, it takes about 10 minutes to walk down to Neptune`s Grotto, and it is worth the view! 10 euros entry is paid at the entrance of the cave, and you get a half-hour guided tour in the cave in Italian, English and German. There is also the necropolis of Anghelu Ruju and Nuraghe Palmavera, two of the most important archeological sites of Sardinia.
This historic town has become one of the most popular destinations for visitors to Sardinia. The car free narrow lanes of the atmospheric old town contain numerous bars and cafes whilst the restaurants are renowned for excellent seafood. The surrounding area brings many delights for those who venture out of the city. These include the famous beaches at La Pelosa - Stintino, the eerily abandoned mining town of Argentiera and the ancient palace complex at Nuraghe di Palmavera.
The coastal road south of Alghero is beautiful, an unspoilt and protected panorama of sparkling sea, lush vegetation and rocky mountains. It leads to Bosa, a small medieval town, which has a distinctive and living historic centre and many points of interest. Bosa is an ideal spot for a relaxing holiday, as it is friendly and has a character and economy which is not based solely on tourism.
As in most parts of Italy food in Alghero is an important thing. The town's fishing port provides seafood fresh from the sea. Make sure that you try Catalan lobster, lobster salad with raw tomatoes and onion. Ricci (sea urchins) are also very popular in Alghero with a festival being held in their honor around febraio sagra"Boga Marin".
Take in the beautiful views at cafe Latino located on the battlements overlooking the harbour. There are also lots of late night bars on the lungomare valencia that get going at around about midnight. Local drinks are Limoncello, Mirto and some local wines that they serve in all restaurants.
There are a whole number of possibilities for accommodation in Alghero from bed and breakfasts to Agroturismos(farm stays) and hotels. You can pick up a list of B&Bs at the friendly Tourist Information office. In the offseason, rates range from E25 - E50 for one person. Expect prices to double in July and August. If you want to book something on line, contact firstname.lastname@example.org - they offer some very special apartments in and around the old town at very competitive prices.
Capo Caccia - see Neptune's Grotto, which includes the "Goat's Staircase" and under water the limestone cliffs continue creating the most vaste underwater marine cave system, Nereo Cave is the bigger and famous with its huge halls and tunnels.