Tallinn is the oldest capital in Northern Europe, first put on the map in 1154 by Arab geographer Al-Idrisi. Enjoy a walking tour in the UNESCO heritage listed Tallinn Old Town. During the tour, explore Holy Spirit Church, the 600 years old Gothic Town Hall, Alexander Nevsky Cathedral, the world`s oldest functioning Pharmacy on Town Hall Square and the 159 meters high Oleveste Church which was the highest structure in the world in the 16th century. Visit Toompea Hill for breathtaking views over the city. Toompea Castle was built in the 13th and 14th centuries and is the seat of Estonia`s parliament.