Someone from my travel group exclaims: "It's minus 20 degrees outside and they still want me to get naked."

It is a chilly late February night in Lapland, Finland's northernmost region. We are inside Jussan Pirtti, a cosy loghouse restaurant by a lake in Yllasjarvi, a small village in Yllas, West Lapland.

Ms Johanna Koivumaa, who manages the loghouse and runs travel company Yllas Adventures, announces that it is time for sauna, or steam bathing, and its highlight: a skinny dip in a frozen lake.

Photos: Debbie Yong, Geoffrey Eu, Geraldine Yeo, Nick Dimbleby, Santapark, Hotel Kakslauttanen

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