BANTEAY SREI is the Citadel of the Lady. It was built by King: Rajendravarman II year: 944 to 968 AD.
Entrance: US$ 40 (can be bought from Angkor Ticket Booth 1 km north of Siem Reap)
It is far away from Siem Reap
, you can get there by tuk tuk (depends on your negoiation skill).