A stunning illuminated pathway of trees that makes one feel like they are in a winter wonderland, the illuminations alongside Keyakizaka in Roppongi Hills is a sight to behold. 
From 4 November till Christmas, you can find the tree lined avenue filled to the brim with 800,000 snow and blue LEDs. Both a major tourist attraction and a staple of the holiday celebrations in the city, the Roppongi Hills illumination attracts thousands of tourists as they vie to get the perfect Instagram shot. 
Just be sure to get there early (the illumination starts at 5 in the evening till 11 in the night) or you might find your perfect shot hampered by the crowds. 