S. Thomas' College, Mount Lavinia

Samudrasanna Vihara ( Sinhala: සමුද්‍රාසන්න විහාරය) is a historic Buddhist temple situated at Mount-Lavinia in the Western province, Sri Lanka. It is located near to the Templers road junction on the Colombo-Galle main road. The temple has been formally recognised by the Government as an archaeological site in Sri Lanka. The designation was declared on 6 June 2008 under the government Gazette number 1553.

Christ Church, (also known as the Church of the Open Door) is an Anglican church in Dehiwala-Mount Lavinia in Sri Lanka. The church is located on Colombo-Galle main road (A2) approximately 0.35 km (0.22 mi) away from the Dehiwala junction. It was consecrated on 16 February 1843. The four tombs within the church's graveyard have been formally recognised by the Government as archaeological protected monuments in Sri Lanka. The designation was declared on 6 June 2008 under the government Gazette number 1553.

Sri Subodharama Raja Maha Vihara (Also known as Karagampitiya Vihara) is a historic Buddhist temple situated at Dehiwala in the Western province, Sri Lanka. The temple is located at the Dehiwala junction on the Colombo-Galle main road, about 9 miles south of Colombo city. The temple has been formally recognised by the Government as an archaeological site in Sri Lanka. The designation was declared on 23 February 2007 under the government Gazette number 1486.

Sri Pushparama Vihara ( Sinhala: ශ්‍රී පුෂ්පාරාම විහාරය) is a historic Buddhist temple situated in Ratmalana, Western province, Sri Lanka. It is located at Sri Dharmarama junction on the Colombo-Galle main road. The temple has been formally recognised by the Government as an archaeological site in Sri Lanka. The designation was declared on 23 February 2007 under the government Gazette number 1486.

National Zoological Gardens of Sri Lanka (also called Dehiwala Zoo or Colombo Zoo) is a zoological garden in Dehiwala, Sri Lanka, founded in 1936. It is home to various birds, mammals, reptiles, fish and amphibians. The zoo not only exhibits animals from Sri Lanka, but also exhibits species from across Asian and other parts of the globe. As of 2005, the zoo has 3,000 animals and 350 species. The annual revenue is LKR 40 million. The Dehiwala Zoo exchanges its residents with other zoological gardens for breeding purposes. In June 2021, a lion named Thor which had been living in the zoo since 2012 reportedly tested positive for COVID-19.

Ratmalana is a suburb in Colombo District, Western Province, Sri Lanka. It is inside the administration boundary of Dehiwala-Mount Lavinia Municipal Council. Ratmalana is situated 14.6 km south of Colombo city centre. Ratmalana Airport located here was the country's first and main international airport until the inauguration of Bandaranaike International Airport, Katunayake in 1967. Ratmalana is also the birthplace of Sir John Kotelawala, the third Prime Minister of Sri Lanka (then Ceylon) elected in 1953. Maliban Biscuit Manufactories, one of the largest manufacturers, distributors and marketers of bakery products in Sri Lanka, is headquartered in Ratmalana.

Bellanwila Rajamaha Viharaya is a Buddhist temple situated in Bellanwila, Colombo District, Sri Lanka. Located around 12 km south to the Colombo city, near Dehiwala - Maharagama road, the temple attracts hundreds of devotees daily and is famous for its annual Esala Perehera festival which usually takes place in the month of August or September. One of the most venerated Buddhist temples in Sri Lanka, many devotees flock to worship the sacred Bo tree of Bellanwila Rajamaha Vihara, which is considered to be one of the first offshoots of Jaya Sri Maha Bodhi in Anuradhapura, Sri Lanka. The present chief incumbent of Bellanwila Rajamaha Vihara is Ven. Dr. Bellanwila Dhammaratana Nayaka Thera.

Ratmalana International Airport (Sinhala: රත්මලාන ජාත්‍යන්තර ගුවන්තොටුපළ, romanized: Ratmalāna Jātyantara Guvantoṭupaḷa; Tamil: இரத்மலானை சர்வதேச விமான நிலையம், romanized: Iratmalāṉai Sarvadesa Vimāṉa Nilaiyam) (officially known as Colombo International Airport, Ratmalana and locally as Ratmalana Airport) (IATA: RML, ICAO: VCCC), is the secondary international airport serving the city of Colombo, the capital of Sri Lanka. It was the country's first international airport and was the only international airport in Sri Lanka until the inauguration of Bandaranaike International Airport, Katunayake, in 1967. The airport currently serves several domestic services and is home to several aviation training organisations. A relaxation of rules has recently seen the airport open for international corporate jet operations and charter flights. The airport is located 15 km south of Colombo City. The strategic significance of Ratmalana International Airport has been identified along with the emerging Colombo Financial City, High End Tourism and business travel needs of High Net Worth Individuals (HNWIs). The long-term strategic goal of RMA is to bring the airport to the optimum operational capacity by maximum utilization of existing resources. Therefore, to achieve this goal, five strategic areas with specific strategies have been identified as Corporate Jet Operations, Domestic Aviation Hub, Aviation Training hub in the Region, FBO & MRO investments and Regional Airports Operations.

Kandawala was the home of General Sir John Lionel Kotelawala CH KBE LLD (4 April 1897 - 2 October 1980) was a Sri Lankan politician, most notable for serving as Prime Minister of Ceylon from 1953 to 1956. The house is located in a 48-acre (190,000 m2) estate that includes a lake known as Kandawala lake. John Kotelawala bought Kandawala estate with its small three bed-roomed house in 1920 at a public auction. In 1926, Kandawala built a two-story main house as his primary residence and office. This is known as Kandawala Valava, and it is the design of an expert architect, Mr. Siribaddhana Divithotavala, who designed the Demodara Nine Arch Bridge and Horagolla Valava. The main house was built by Kotelawala in 1926. He moved in soon after its completion. During World War II, the house was used as the station headquarters and officers mess for the RAF based at the Ratmalana Airport. Kotelawala remained at Kandawala even after he became Prime Minister and did not move into Temple Trees. He carried out much state business from his office in Kotelawala. After his death, in accordance with Sir John's last-will, Kandawala Estate was handed over to the Sri Lankan military to be turned into a Tri-Service Defence Academy. In 1985 the Sri Lankan Government established General Sir John Kotelawala Defence Academy at Kandawala named after him, it was renamed General Sir John Kotelawala Defence University in 2007.

Aishwarya Lakshmi Amman Temple or kovil is located in the Colombo District, Wellawatte, western province Sri Lanka.

The Weras Ganga Park (also known as Weras Ganga Bellanwila Recreation Park) is a public park located in Bellanwila area, next to the Bellanwila Rajamaha Viharaya in Colombo, Sri Lanka.

The Sri Lanka Air Force Museum (SLAF Museum) is the museum of the Sri Lanka Air Force, and its predecessor, the Royal Ceylon Air Force. Open to the public, the museum is at the SLAF Ratmalana and is maintained by the Sri Lanka Air Force.