Built around 1475, this tall, stout fortress is one of Tallinn’s most formidable cannon towers. Its name (amusing as it sounds in English) is Low German for ‘Peep into the Kitchen’; from the upper floors medieval voyeurs could peer into the houses below. Today it houses a branch of the City Museum, focusing mainly on the development of the town’s elaborate defences.
The tower was badly damaged during the Livonian War, but it never collapsed (nine of Ivan the Terrible’s cannonballs remain embedded in the walls). If you’re interested in military paraphernalia, you’ll find a treasure trove on the upper floors. There are great views from the cafe on the top floor.