Top 3 Natural Monuments around Porvoo
Porvoo’s landscape is a beautiful place to explore — something that you can best experience by visiting one of our 3
beautiful natural monuments around Porvoo. To help you find the one for, you can see all the details you need to explore the best natural monuments, and better plan your next outdoor adventure!
Last updated: July 20, 2026
Lahankoski Waterfall
Highlight • Waterfall
The waterfall is formed, when the slowly flowing river pours down a rocky cliff, which extends across the whole width of the stream bed. Before the rapids the river flow is calm. The steepness of the cliff varies along the width of the waterfall, being at best, completely vertical. After the fall, the water to continues its way under the nearby road bridge, and from there to the reservoir of the hydroelectric power plant.
Lahankoski has reportedly got its name from the fact that in the past the river was used often for transporting. As the water level in the rapids was low, the boats had to be portaged along the shore past the waterfalls (portage is laahata in Finnish). Lahankoski has also played an important role in the history of the nearby Laha estate (which is more than 200 years old). On the west side of the first waterfall there has been a sawmill, which was operational until 1912. Below the fall, on the other hand, there has been a watermill of the nearby Kupsenkylä village. The concrete foundations of the mill are still visible in the river. In addition, some remnants of an old log floating flume can still be seen at the river, as log floating was practiced there until the 1950s.
The Laha estate watermill was built in 1892, in the lower part of the rapid, where it served as a small power station in addition to the normal milling activity. Electricity was produced with two generators for the use of the estate itself and the neighbouring houses. Power generation ended in the 1960s, when the turbines broke due to freezing. Lahankoski was then able to flow free until the year 2010, when the hydroelectric plant was renewed, and most of the rapids lost its natural water flow. Happily, however, the highest and steepest waterfall in the rapid was left outside of the hydropower production, even though it is said that at the early stages of the project that was also considered.
Lahankoski can be easily reached by car along the Meijerintie road, and there are several parking places near the rapids. The main waterfall is easy to admire from the wooden road bridge, from where you can see the fall straight ahead. Excluding the driest periods of the year, there is enough water to cover most of the rocky cliff, and the roar of the rapids is an impressive sound. The cultural landscape of the Laha estate around the waterfall is open and idyllic countryside. During the summer, a variety of events are arranged in the area, including exhibitions and film screenings in the renewed mill building. In addition, it is possible to ride or play tennis, if you like to.
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Lemminkäinen's Temple
Highlight • Cave
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Giant's Kettle of Askola (Jättiläisen Kuhnepytty)
Highlight • Natural Monument
The glacier pots, as they are also called, can be reached on foot from a parking lot. All-terrain footwear is definitely required.
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Virvikin Jättiläinen Boulder
Highlight • Natural Monument
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View from Lennätinvuori (Telegrafberget)
Highlight • Viewpoint
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This massive boulder is a standout feature of the Virvik Nature Trail. Towering approximately ten meters high, it dates back to the last Ice Age. An information board in front of the boulder offers additional details about its history and significance.
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History: A plaque at the base of the observation tower also explains the strategic importance of the lookout point. During the Crimean War in 1854, a telegraph line was built between Hanko and Kronstadt, St. Petersburg. Between Hankoniemi and Pitkäpaaten, there were 42 optical telegraph stations. One of the stations on the line was located at Haikkoon Lennätinvuori. The telegraph line was only in operation for two summers, as it was replaced in 1855 by the electromagnetic telegraph line from St. Petersburg to Helsinki.
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Haikkoo Telegrafberget (Swedish: Telegrafberget) is a popular lookout point in the forest next to the Haikkoo Manor Hotel and Spa in Porvoo, offering views over the bay and the Haikon Hills. Lennätinvuori is part of Porvoo National Park. The Lennätinvuori Nature Reserve was established on October 14, 1961, by a resolution of the Uusimaa County Government. A lookout tower was built on the rock in the 1990s, with a table and benches next to it. On the side of the lookout tower is a painting by Albert Edelfelt entitled "Summer Evening on Haikko's Back," painted in the autumn of 1899, as well as a plaque telling the story of Telegrafberget. There are two official hiking trails to Näköalakallio, one starting at the intersection of Haikkoontie and Mohikaanipolu, and the other at the Haikkoontie Manor parking lot. Source: Wikipedia: https://fi.wikipedia.org/wiki/Haikkoon_lenn%C3%A4tinvuori
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By chance, because we were looking for a stand, we became aware of this place. And we can only recommend him to everyone. The glacier mills were created at the end of the Ice Age. If you want to know more about it, you can do so on the following homepage: http://hiidenkirnut.fi/die-gletschertopfe-von-askola/ The glacier pots, as they are also called, can be reached on foot from a parking lot. All-terrain footwear is definitely required.
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Set of large boulders with a cave underneath. It's supposedly the site of an old pagan temple but this theory is disputed.
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River rapids just off the paved road, easily reachable by a short smooth gravel segment. Depending on the time of the year you might either see a small stream or a raging, 3m high waterfall.
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Was there late summer and the river was too low for a proper waterfall, still worth the detour though.
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Just a short hike up the hill from the nearby easier trails
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