Tallinn is a bustling coastal city located in Estonia, known for its rich history and cultural heritage. The city offers a unique blend of medieval and modern architecture, with a vibrant cultural scene. Tallinn is a popular destination for tourists and offers a wide range of activities and experiences for visitors to enjoy.

Here are some sights you should not miss when being in Tallinn:

1. Old Town of Tallinn - A UNESCO World Heritage site, the Old Town is known for its well-preserved medieval architecture, including the impressive town wall and towers.
2. Toompea Castle - The castle is located on a hilltop and offers panoramic views of the city. It's also home to the Estonian parliament.
3. St. Olav's Church - This medieval church is the tallest building in Tallinn and offers great views from the top of its spire.
4. Kadriorg Palace - This baroque palace was built for Peter the Great and now houses an art museum. The palace gardens are also a popular spot to visit.
5. Telliskivi Creative City - A former industrial area that has been converted into a trendy neighborhood with street art, independent shops, and cafes.

Overall, Tallinn is a city that has something to offer for everyone - whether you are interested in the rich history, culture and architecture or want to enjoy the scenery around the city. The historical flair combined with modern architecture gives the city a unique charm. To put it in a nutshell, Tallinn is a city that is absolutely worth a visit.