The opening hours vary according to the services and ceremonies.
No admission fee.
Wikipedia http://ko.wikipedia.org/wiki/%ED%99%94%EA%B3%84%EC%82%AC
Official website http://www.hwagyesa.org/
More information on visitseoul.net http://www.visitseoul.net/en/article/article.do?_method=view&art_id=495&lang=en&m=0004003002027&p=03
Phone +82 2 902 2663
Address 487 Suyu- 1(il) dong, Gangbuk-gu, Seoul, South Korea
Coordinates 37°37'58.094" N 127°0'26.086" E