1. Salzburg Old Town (Salzburger Altstadt) is a UNESCO World Heritage Site located in the heart of Salzburg, Austria. It is known for its baroque architecture, narrow streets, and charming squares. Some interesting facts about the old town include:

- It was the birthplace of famous composer Wolfgang Amadeus Mozart in 1756.

- The Hohensalzburg Fortress, which overlooks the old town, is one of the largest intact fortresses in Europe.

- The Getreidegasse is a popular shopping street in the old town, famous for its decorative wrought iron signs above the shops.

- The Mirabell Palace and Gardens, located just outside the old town, were featured in the film \"The Sound of Music.\"

2. The old town is open to visitors at all times, although some shops and attractions may have their own operating hours. The Salzburg tourist information center can be reached at +43 662 88987-0.

3. There is no admission fee to enter the old town, although some of the attractions within it may require tickets. The old town is easily accessible by foot, as it is a compact area. However, there are also buses and taxis available for transportation.