We can get spectacular views of the Kremlin walls and towers from moskva river during the moskva river cruise. The Moscow Kremlin Wall is a defensive wall that surrounds the Moscow Kremlin, recognisable by the characteristic notches and its Kremlin towers.

Make sure you have a good guide as we did with Tucan Travel. So much history to be told rather than just admire the buildings. Big crowds but well managed.

To be in Moscow and not to visit Kremlin it's like to be in Paris and not to visit Eiffel Tower :) I recommend to get guides though because without the guides you will just see few cathedrals, canons, etc. but won't have a clue what it is about. Our guide was amazing and very detailed so we learned so much! She explained not only the history but individual frescas and the stories behind them. Truly interesting place. You also can go for a walk to the garden there where you can see heli pads where president's helicopters land when he is arriving by them. He usually is not there but we were told that when he is, he can be seen walking outside and even posing for selfies with tourists :)