1. Tallinn Old Town, also known as Vanalinn, is a UNESCO World Heritage Site located in the heart of Tallinn, the capital of Estonia. The Old Town is one of the best-preserved medieval cities in Europe and is famous for its well-preserved city walls, cobbled streets, and historic buildings.

One interesting fact about Tallinn Old Town is that it is home to the oldest continuously operating pharmacy in Europe, Raeapteek, which has been in business since the early 15th century. Another interesting fact is that the iconic Tallinn Town Hall, located in the heart of the Old Town, is one of the best-preserved medieval town halls in Northern Europe.

2. The working hours of individual attractions, shops, and restaurants in Tallinn Old Town may vary, but generally, the Old Town itself is open for exploration 24/7. If you need specific information or have any questions, you can contact the Tallinn Tourist Information Centre at +372 645 7777.

3. There is no entrance fee to explore Tallinn Old Town as it is a public area. To reach the Old Town, you can use public transportation like buses or trams, which are well connected to the area. Additionally, many visitors choose to explore the Old Town on foot as it is relatively compact and easy to navigate.