It’s a good idea to buy your tickets in advance. For example, if you get to Siem Reap today, buy the ticket for the following day. This is because there’s always a long queue at the ticket booth, with people vying to buy a ticket to enter the temple. By the time you’ve managed to buy a ticket, you will likely be massively exhausted. The ticket counter is open from 5 AM to 4:30 PM, but people flock there earlier than 5 AM. When buying the ticket, they’ll snap a picture of you to compare with your passport. Tickets are available for varying durations, from one day to three days to seven days. If you can, go for the longest duration, as there’s so much to see at Angkor Wat.