With Tallin Free Walking Tours, you can spend days exploring the fairy-tale Old Town, a UNESCO World Heritage site. Your guide will take you for a stroll through medieval lanes and show you the modern Town Hall Square, a natural magnet for people that becomes engulfed in cafe tables during the summer. Also, you will stop by St. Catherine’s Passage to take gorgeous pictures under the passage behind St. Catherine’s Church. And, of course, no Free Tour in Tallinn is complete without making a stop at the Alexander Nevsky Cathedral, one of the top landmarks in the city. This Orthodox 19th-century cathedral sits in the heart of the city and is adorned with striking details and an incredible onion-dome. Other must-see sights in the Old Town include the Niguliste Museum, a former church and now an art museum, and the Viru Gate. If you want to explore further, head up to the top of Toompea Hill, where you can find Toompea Castle and stunning views of the city.