St. Mary's church. Originally medieval, it was damaged by fire in 1821 and renovated by Carl Ludvig Engel in 1828. It is the oldest building in Kymenlaakso.
St. John's Church, designed by Carl Ludvig Engel in 1843.
Orthodox Church of St Peter and St Paul (1837). The church is built on a site where two other churches (Ulrika Eleonora Church, built in 1732 and destroyed in 1742, and Elizabeth Church, built in 1750 and destroyed in 1821) were located. The belfry is built in 1862.
Town Hall. Originally built in 1798, it was renovated by Carl Ludvig Engel in 1840.
Reserve Officer School
Town Museum. It is located in a building where King Gustav III of Sweden and Empress Catherine II of Russia met in 1783.
Shopkeeper's Museum
Google Data Center (former Stora Enso pulp factory)
Hamina Fortress, built in the 18th century. The corners of the fortress form six bastions, named after towns in Finland. The Central Bastion was added at the end of the 18th century, and is currently used for cultural events
