Kolomna Kremlin was built on the order of Grand Prince Vasily III: the complex includes the brick wall with seven towers (including the famous "Marina"), Assumption Cathedral, Tikhvin Church, bishop's house, and a number of other interesting old buildings.
This Kremlin has many towers and is not yet touched by the soviet restoration. You can truly see all the misery that had happened in the past. It symbolizes the city and is very beautiful. In it is also an exhibition of munitions and you can even take and touch it. This is why it might be even interesting for children and therefore ensures a pleasant family trip.