Question: Where did they film The Beach in the country where Siddhi Savetsila was born?

Knowledge 1: Siddhi Savetsila
Siddhi Savetsila was born in Bangkok. He comes from an aristocratic background. His father was a high-ranking official in the royal government. His paternal grandfather was Henry Alabaster who was the British consul in Siam during the reign of King Rama IV (Mongkut) and then served as an advisor to King Rama V (Chulalongkorn). His mother was an offspring of the influential Bunnag family, the daughter of Thet Bunnag (later Chao Phraya Suraphan Phisut), making him a direct descendant of Somdet Chao Phraya Borom Maha Prayurawongse. [SEP] Knowledge 2: The Beach (film)
Controversy arose during the making of the film due to 20th Century Fox's bulldozing and landscaping of the natural beach setting of Ko Phi Phi Leh to make it more ``paradise - like ''. The production altered some sand dunes and cleared some coconut trees and grass to widen the beach. Fox set aside a fund to reconstruct and return the beach to its natural state; however, lawsuits were filed by environmentalists who believed the damage to the ecosystem was permanent and restoration attempts had failed. Following shooting of the film, there was a clear flat area at one end of the beach that was created artificially with an odd layout of trees which was never rectified, and the entire area remained damaged from the original state until the tsunami of 2004. [SEP] Knowledge 3: Bang Bon District
Bang Bon (Thai: บางบอน, pronounced [bāːŋ bɔ̄ːn]) is one of the 50 districts (khet) of Bangkok, Thailand. Its neighbours, clockwise from north, are Bang Khae, Phasi Charoen, Chom Thong, and Bang Khun Thian districts of Bangkok, Mueang Samut Sakhon District and Krathum Baen District of Samut Sakhon Province, and Nong Khaem District of Bangkok.
Knowledge 1: Bang Bon District
Bang Bon (Thai: บางบอน, pronounced [bāːŋ bɔ̄ːn]) is one of the 50 districts (khet) of Bangkok, Thailand. Its neighbours, clockwise from north, are Bang Khae, Phasi Charoen, Chom Thong, and Bang Khun Thian districts of Bangkok, Mueang Samut Sakhon District and Krathum Baen District of Samut Sakhon Province, and Nong Khaem District of Bangkok. [SEP] Knowledge 2: The Beach (film)
Controversy arose during the making of the film due to 20th Century Fox's bulldozing and landscaping of the natural beach setting of Ko Phi Phi Leh to make it more ``paradise - like ''. The production altered some sand dunes and cleared some coconut trees and grass to widen the beach. Fox set aside a fund to reconstruct and return the beach to its natural state; however, lawsuits were filed by environmentalists who believed the damage to the ecosystem was permanent and restoration attempts had failed. Following shooting of the film, there was a clear flat area at one end of the beach that was created artificially with an odd layout of trees which was never rectified, and the entire area remained damaged from the original state until the tsunami of 2004. [SEP] Knowledge 3: Siddhi Savetsila
Siddhi Savetsila was born in Bangkok. He comes from an aristocratic background. His father was a high-ranking official in the royal government. His paternal grandfather was Henry Alabaster who was the British consul in Siam during the reign of King Rama IV (Mongkut) and then served as an advisor to King Rama V (Chulalongkorn). His mother was an offspring of the influential Bunnag family, the daughter of Thet Bunnag (later Chao Phraya Suraphan Phisut), making him a direct descendant of Somdet Chao Phraya Borom Maha Prayurawongse.
Knowledge 1: Siddhi Savetsila
Siddhi Savetsila was born in Bangkok. He comes from an aristocratic background. His father was a high-ranking official in the royal government. His paternal grandfather was Henry Alabaster who was the British consul in Siam during the reign of King Rama IV (Mongkut) and then served as an advisor to King Rama V (Chulalongkorn). His mother was an offspring of the influential Bunnag family, the daughter of Thet Bunnag (later Chao Phraya Suraphan Phisut), making him a direct descendant of Somdet Chao Phraya Borom Maha Prayurawongse. [SEP] Knowledge 2: Bang Bon District
Bang Bon (Thai: บางบอน, pronounced [bāːŋ bɔ̄ːn]) is one of the 50 districts (khet) of Bangkok, Thailand. Its neighbours, clockwise from north, are Bang Khae, Phasi Charoen, Chom Thong, and Bang Khun Thian districts of Bangkok, Mueang Samut Sakhon District and Krathum Baen District of Samut Sakhon Province, and Nong Khaem District of Bangkok. [SEP] Knowledge 3: Sylvan Beach Union Chapel
Sylvan Beach Union Chapel is a historic interdenominational church building located at Sylvan Beach in Oneida County, New York. It opened on July 3, 1887 and worship services have been held there every summer since then. The film "The Sterile Cuckoo" starring Liza Minnelli was shot in part at the church.

Answer: Ko Phi Phi Leh