Mobile Sauna Festival in Teuva, Finland More than 50 pocket-sized saunas gather on a lakeside in the small town of Teuva, western Finland, for the fifth annual Mobile Sauna Festival Tweet A man emerges from a telephone booth that was turned into a mobile sauna Photograph: Markku Ojala/EPA A man fuels up a Datsun Finn rally car-sauna Photograph: Markku Ojala/EPA A couple kiss in a cosy sauna Photograph: Markku Ojala/EPA A combine harvester that has been turned into a mobile sauna Photograph: Markku Ojala/EPA There are just two rules for the saunas: they have to be mobile, and they have to fit at least one person inside Photograph: Markku Ojala/EPA A view inside a mobile sauna Photograph: Markku Ojala/EPA A man holds 'vihta', a bunch of leafy birch twigs that is a traditional washing implement Photograph: Markku Ojala/EPA The 'horse' that pulls this sauna is really a scooter Photograph: Markku Ojala/EPA The festival has grown since 2006, when just 18 saunas were on display Photograph: Markku Ojala/EPA Some 6,000 visitors visited the festival, doubling the population of Teuva for the weekend Photograph: Markku Ojala/EPA