1. It is one of the most famous squares in the world. 
We can see Lenin's mausoleum,  St. Basil Cathedral,  the State Historical Museum  and  the Kremlin there .2. It is former tsar's residence, now it's a city and a Park-Museum. We can see there Grand Peterhof Palace, Grand Cascade and a lot of other different fountains.3. The Hermitage, the Russian Museum 4. Alexander's Garden 5. The Bolshoy Theatre 6. The Mariinsky Theatre 7. The Armoury Chamber showcases ancient state regalia, ceremonial tsar’s vestments and coronation dress, vestments of the Russian Orthodox Church’es hierarchs, the largest collection of gold and silverware by Russian craftsmen, West European artistic silver, ceremonial weapons and arms, carriages, horse ceremonial harness.