The site for the sanctuary will be by a riverbank in Kuala Selangor, Malaysia. Kuala Selangor is a small and quiet town at the river mouth of the Selangor river and is famous for the fireflies sanctuary and cheap seafood. The local climate is equatorial and the average daily temperatures are at around 27°C throughout the year. Extensive cloud cover and heavy rainfall prevent temperatures from rising much over 33°C.
I chose this site as it is far away from the city. The stillness and remoteness of this town will be suitable for the young woman to give her utmost attention to the letter and contemplate. The river and the fireflies will be her distraction after reading the letter.