The capital city of Estonia is Tallinn. Located on the northern coast of the country along the Gulf of Finland, Tallinn is known for its well-preserved medieval architecture, with a charming old town that is a UNESCO World Heritage site. The city serves as both a cultural and economic hub, with a vibrant mix of history and modernity. Visitors to Tallinn can explore landmarks like the Alexander Nevsky Cathedral, Toompea Castle, and the town hall square. Tallinn is also recognized for its digital innovation and is often referred to as one of the most digitally advanced cities in the world.