The temple's architecture demonstrates an eclectic mix of Sri Lankan, Thai, Indian, and Chinese architecture. This Buddhist temple includes several imposing buildings and is situated not far from the placid waters of Beira Lake on a plot of land that was originally a small hermitage on a piece of marshy land. It has the main features of a Vihara (temple), the Cetiya (Pagada) the Bodhitree, the Vihara Mandiraya, the Seema malaka (assembly hall for monks) and the Relic Chamber. In addition, a museum, a library, a residential hall, a three storeyed Pirivena, educational halls and an alms hall are also on the premises. Most notable for tourists is the architecture of the Simamalaka Shrine, which was built with donations from a Muslim sponsor to the design of Geoffrey Bawa.

The Old Parliament Building, is the building that houses the Presidential Secretariat of Sri Lanka. Situated in the Colombo fort area facing the sea, it is in close proximity to the President's House, Colombo and adjacent to the General Treasury Building. The building housed the island's legislature for 53 years until the new parliamentary complex was opened at Sri Jayawardenepura in 1983.

The Khan Clock Tower was built in Colombo, Sri Lanka by the Khan Family of Bombay. The Clock Tower is a popular landmark and marks the entrance to Pettah Market. The Clock Tower was built in the early 20th century by the family of Framjee Bhikhajee Khan. This Parsi family hailed from Bombay, India and also owned the famous Colombo Oil Mills as well as other business interests in Ceylon, as Sri Lanka was then called. The clock tower also provided a working water fountain, but this no longer functions. The plate on the clock tower carries the inscription: "This clock tower and fountain was erected to the memory of Framjee Bhikhajee Khan by his sons Bhikhajee and Munchershaw Framjee Khan as a token of affectionate gratitude and dedicated through the Municipal Council to the citizens of Colombo on the fourth day of January 1923, the 45th anniversary of his death." The Tower is roughly four storeys high and is situated on a landscaped roundabout that marks the entrance to the famous market.

National Museum of Colombo, also known as the Sri Lanka National Museum is one of two museums in Colombo. It is the largest museum in Sri Lanka. It is maintained by the Department of National Museum of the central government. The museum holds contains a collections of much importance to Sri Lanka such as the regalia of the country, including the throne and crown of the Kandyan monarchs as well as many other exhibits telling the story of ancient Sri Lanka.

The Arcade Independence Square is a shopping complex in the city of Colombo in Sri Lanka, housed in a group of renovated buildings including the former Jawatta Lunatic Asylum (later known as the Auditor General's building) and the former Western Provincial Council Building. It was built as a part of the Independence Square Redevelopment programme initiated by the Sri Lankan Government.

Construction of the Jami-Ul-Alfar Mosque commenced in 1908 and the building was completed in 1909. The mosque was commissioned by the local Indian Muslim community, based in Pettah, to fulfill their required five-times-daily prayer and Jummah on Fridays. The mosque's designer and builder was Habibu Labbe Saibu Labbe (an unqualified architect), and was based on details/images of Indo-Saracenic structures provided by South Indian traders, who commissioned him. It is a hybrid style of architecture, that draws elements from native Indo-Islamic and Indian architecture, and combines it with the Gothic revival and Neo-classical styles. Originally it had the capacity for 1,500 worshippers although at the time only around 500 were attending prayers.

Galle Face is a 5 ha (12 acres) ocean-side urban park, which stretches for 500 m (1,600 ft) along the coast, in the heart of Colombo, the financial and business capital of Sri Lanka. The promenade was initially laid out in 1859 by Governor Sir Henry George Ward, although the original Galle Face Green extended over a much larger area than is seen today. The Galle Face Green was initially used for horse racing and as a golf course, but was also used for cricket, polo, football, tennis and rugby.

Viharamahadevi Park (formerly Victoria Park) is a public park located in Colombo, next to the National Museum in Sri Lanka. It is the oldest and largest park of the Port of Colombo. Situated in front of the colonial-era Town Hall building, the park is named after Queen Viharamahadevi, the mother of King Dutugamunu. The park was built on land donated to the Colombo city by Charles Henry de Soysa during the British rule of Sri Lanka, and used to be named "Victoria Park" after Queen Victoria. During World War II it was occupied by the British Army with Australian 17th Brigade based at Victoria Park. After the war the park was restored and open to the public in 1951. There used to be a cricket ground in the park, which was used for first-class cricket between 1927 and 1995. Ceylon played against a touring English team there in 1927 and against an Australian team in 1935.

Known as Kolonthota, the area became notable as the site of the first landings of the Portuguese in the early 16th century and became one of their trading posts in the island. The Portuguese developed their trading post into a fortified base and harbour to extend their control of the interior of the island. The fort was besieged several times during the Sinhalese–Portuguese War, most notably in 1587, but was held. It was conquered by the Dutch East India Company in 1656 after they intervened in the war. With Colombo gaining prominence as the center for Dutch administration in the island, it was expanded to protect against both the sea and the interior of the island. The Dutch demolished the Portuguese-built fortification and reconstructed it to take advantage of the natural strength of the location between a lake and the sea. The present layout of Fort and the Pettah was the result of the Dutch remodeling of Colombo. The Pettah was known in Dutch times as the 'Oude Stade' and consisted of the residential area of Colombo. The Fort was where they built their fortifications, it was known as 'the Casteel' in Dutch.

The Old Colombo Dutch Hospital (known as The Dutch Hospital) is considered to be the oldest building in the Colombo Fort area dating back to the Dutch colonial era in Sri Lanka. It is now a heritage building and a shopping and dining precinct.