Must see in Finland! Julma-Ölkky is Finland's largest canyon lake, nestled in a deep crevice that dates back over 2 billion years.

Located within Hossa National Park, this stunning natural wonder offers boat rides for visitors to explore its 3 km length and 50 m depth. With boat trips available daily during the summer months, Julma-Ölkky provides a unique opportunity to experience the beauty of Finland's rugged landscape from the water.

You can also rent a kayak or canoe and do it yourself.

There is also a beautiful hiking trail that takes you around the canyon lake, which I highly recommend if you have the time. It takes about 3-4h to complete.