Use the filter above the posters to choose a ticket:
You can search by event type (“Exhibitions”, “Observation deck”, “Excursions”, “New Year’s performances”) and date.
Click on the “Purchase” button and go to the “Location”:
At pointing to the location a popup tip appears with the information about the ticket type and price. Click to add the ticket to the cart (the unpurchased item will be removed from the cart in 10 minutes).
Choose the e-ticket and go to the payment.