Vanalinn is the old town of Tallinn, the capital of Estonia. It is one of the best-preserved medieval towns in Europe and is recognized as a UNESCO World Heritage Site. Vanalinn is located in the heart of Tallinn and is surrounded by a city wall with numerous towers and gates.

Vanalinn has many interesting sights, including the Town Hall Square, which is the hub of the old town and is surrounded by colorful buildings and cafes. The town hall itself is a magnificent Gothic building that dates back to the 13th century. Another highlight is the Toompea Castle, which is located on a hill and offers stunning views of the city. The Alexander Nevsky Cathedral, a Russian Orthodox church, is also located on the hill and is an impressive sight with its onion domes and intricate decoration.

Vanalinn has many narrow cobblestone streets and alleys, which are lined with charming old buildings, shops, and restaurants. Visitors can also explore the old town's many churches, such as the St. Olaf's Church, which was once the tallest building in the world.

Overall, Vanalinn is a fascinating and beautiful place to visit, and it offers a glimpse into Estonia's rich history and culture.