Radio and TV Museum, also known as Mastola, is a museum located in Lahti, Finland. The museum is near the city centre on the Radiomäki hill. Next to the museum building are two 150-meter-high radio masts built in 1927. The masts are a well-known landmark and a symbol of the city. The museum operates in a radio station building designed by a Finnish architect Kaarlo Könönen and built in 1935.