I visited this WHS in August 2016. This WHS is Russia's most iconic and well-known site and clearly a top cultural WHS. Even though it is yet another church/cathedral, St Basil's is definitely a highlight of the Red Square at any time of the day. The interior is worth visiting (closed on Wednesdays) even though its colourful exterior is what makes it so famous. I visited the Red Square every day for 5 days and I loved walking round the Kremlin walls and towers at sunrise or at night and always felt very safe. The Lenin Mausoleum is only open from 10am till 1pm (closed on Mondays and Fridays) and if you have time it's worth visiting if only to get a closer look at Gagarin's tombstone situated just behind the mausoleum. The GUM superstore is completely lit up at night with thousands of light bulbs which in my opinion spoils the mystic atmosphere of the dreamy lights on the Kremlin wall. To my surprise the Red Square is fenced off at midnight and is accessible again after 7am. However, St Basil's can still be viewed at these times by going round the GUM superstore. Two other interesting structures are the dark red State History Museum and the Kazan Cathedral (even though both interiors are nothing special). By heading out of the Red Square towards the Four Seasons Hotel (excellent panoramic view from the Skybar) and the Alexander Gardens, you will find the Kremlin's entrance and ticket counters. The basic entrance ticket grants access to the churches on Cathedral Square, while there are separate tickets to the Armoury Chamber, the Grand Kremlin Palace (through very expensive tours only) and the Ivan the Great Bell Tower (limited tickets; even though currently the panoramic view is spoilt by scaffolding on the Assumption Cathedral right opposite the bell tower). Allow at least half a day to be able to visit the main churches of Cathedral Square, namely the Assumption Cathedral, the Church of Laying Our Lady's Holy Robe, the Archangel's Cathedral, the Annunciation Cathedral, the Patriarch's Palace and the 12 Apostles' Church plus viewing the Tsar Bell and Cannon. I entered the Kremlin early in the morning before most of the tour groups and I managed to visit without too many crowds. The icons, mural paintings and church riches are mindboggling and would be worthy of inscription alone. That is why in my opinion this ensemble is truly one of the best WHS of the list. I wouldn't mind paying the entrance ticket again should I ever revisit as I really enjoyed my first visit.