Viru Bog, bog in Lahemaa National Park, Estonia

Viru Bog is a raised bog located in Lahemaa National Park in northern Estonia, covered with a mix of mosses, low shrubs, and small open water pools scattered across the surface. The terrain is flat and open, with scattered pine trees growing at the edges where the bog gradually gives way to drier ground.

The bog became part of Lahemaa National Park when it was founded in 1971, making it one of the earliest protected wetlands in the Soviet Union. Before that, the area had been largely left alone, its waterlogged ground making it difficult to farm or develop.

Viru Bog is one of the most visited natural sites in Estonia, drawing walkers from both the country and abroad throughout the year. The wooden boardwalk makes the landscape accessible to people who would not normally venture into wetland terrain.

A wooden boardwalk runs through the bog and keeps feet dry even after heavy rain, making it walkable in almost any weather. An observation tower along the route offers a good view over the open terrain and helps visitors get a sense of the full scale of the area.

Under the moss and peat, there are ancient sand dunes and ridges left over from a much earlier period in the land's geological history. These formations are usually found in dry landscapes, making their presence beneath a bog an unusual combination that geologists find worth studying.