Tallinn Traveller organises several adventures conducted by local youths that are cheaper and more original than most guided tours out there. There's also an intimate 'Old Town Walking Tour' that'll give you the chance to walk around Old Town, chat with the locals and all the while gaining insight on cultural differences and insider tips on what Tallinn is really all about. Tours must be booked in advance, cost €10 per person and requires a minimum of three people. Last but certainly not least there's the 'Tallinn Pub Crawl', great for those who like to party. It costs €16, gains you access to several bars and pubs, includes at least 6 free 'shots', an Estonian 'surprise drink' and certain discounts. It is highly recommended that you book all of these tours in advance as they have become quite popular and spaces tend to fill up quickly. See website or visit them for more info.