There is no other city in the world like Venice where the entire city is an outdoor museum. Get lost in narrow streets far from tourist places and experience crossing more than 400 bridges, and may be you can be the one telling the exact number of bridges.
You can find in Rome several walking tours guided by professional guides and free of charge, although tips are welcome if you enjoyed your time. No reservation needed, every day, any weather. Choose one that suites best your time and interests or combine several tours together.
Part of the global initiative started in London - Open House Roma has become a tradition in Italy - one weekend per week (in May, check program www.openhouseroma.org) more than 170 private palaces, mansions, homes, libraries and other buildings open their doors to public. This is a rare opportunity to see places otherwise closed for public admission, especially for art and architecture lovers. All buildings offer free admission, although some of them request prior registration.
On DomenicAspasso Sundays tens of thousands of people attend special events and visit various cultural sites that are open especially for this occasion. This is a unique opportunity to see interesting places and sites and with free admission. On 2013 the dates of the DomenicAspasso are the following: March 17th, April 7th, May 12th, June 9th, July 14th, September 8th, October 13th and November 17th. For other dates check www.tourism.milan.it.
The Rose Garden in Florence located below Piazzale Michelangelo is a place of magical beauty: about 400 varieties of roses for a total of more than 1200 plants are displayed here. Open daily from 8:00-20:00, with free entrance, suggested visit in May. Recently it was extended with a Japanese garden.
Every second Thursday of a month Pallazo Strozzi hosts Thursday Squared - a creative evening to reveal yourself. From 19.00 on, release creativitiy in yourself in the courtyard of Palazzo. You can make an object from original materials and take it home as a keepsake or gift. The programme changes every month and you can check it here. All activities in the Courtyard are free.
The Villa of Castello was one of the first Medici villas outside Florence dating back to 1477. The villa is not open to the public, but visitors may walk through the splendid garden planted with magnificent range of citrus and other rare plants. Garden exhibits antique and Renaissance statues, pay special attention to the Grotto with animals carved in different types of stone and marble. Athough garden is open almost every day, it may be closed due to technical reasons, so better call in advance +39055-452691.
If you want to get more insight in historical and art heritage of churches in Florence, look for volunteer guides inside a church under the logo of Ars et Fides Firenze. They will help you to reveal the magnificent beauty of each place. Please note that in some churches you should by an entrance ticket.