Lake Vesijärvi
A nice way to spend a summer day is to embark a paddlewheeler ship to cruise Lake Vesijärvi. Remember to have an ice-cream onshore.
Radio and tv museum
Lahti's radio and television museum is located on Radiomäki literally Radio Hill. You can see receiving and transmission equipment from the 1920's to modern times, and outdoors you can't miss the two long wave masts that can be seen from everywhere around the city.
Medieval Greystone Church of Hollola
Visit nearby Hollola for it's medieval greystone church. Completed around 1480 it represents the best middle aged church architechture. This church is famous for it's well preserved wooden carvings, some of which are from the 1400s.
Lahti has the best known symphony orchestra in Finland, Sinfonia Lahti. Annual winter sport event, Salpausselän kisat is very popular and worth to see.