1. Preah Khan is a temple complex located in the Angkor Archaeological Park in Siem Reap, Cambodia. It was built in the 12th century by King Jayavarman VII and was originally a center for education and Buddhist studies. The temple covers an area of over 56 hectares and is surrounded by a moat. Preah Khan features multiple structures, including halls, libraries, courtyards, and shrines. The temple has undergone extensive restoration efforts, and visitors can see intricate carvings and beautiful architecture. Interesting facts about Preah Khan include that it was used as a location for the movie Tomb Raider, and that its name translates to \"Sacred Sword.\"

2. The Angkor Archaeological Park is open from 7:30am to 5:30pm daily, including holidays. The phone number for the park’s ticket office is +855 63 963 104, and the park’s website is angkor.com.kh.

3. To visit Preah Khan, visitors will need to purchase a ticket to the Angkor Archaeological Park. The ticket prices are as follows:

- $37 USD for a 1-day pass

- $62 USD for a 3-day pass valid for any 3 days within a week

- $72 USD for a 7-day pass valid for any 7 days within a month