Fort Zverev, constructed by engineer Konstantin Zverev in the 1870s, stands as a stark reminder of military innovation and its unforeseen consequences. This abandoned fortification, part of the Northern Forts near Kronstadt, is renowned for its unique and eerie basement area. Here, a fire in the 1970s involving a Russian alternative to napalm reached temperatures exceeding 2000°C, literally melting the brickwork above and creating an artificial cave of red brick stalactites.
Visitors consistently highlight the fort's desolate beauty and the chilling atmosphere of the melted basement. Many describe it as a truly unique and somewhat disturbing experience, offering a glimpse into a forgotten chapter of history. The site is praised for its photographic opportunities, especially the surreal melted brick formations. However, several reviewers caution about the fort's dilapidated state, emphasizing the need for careful exploration due to unstable structures and potential hazards.
For a visit, sturdy footwear is essential, and a flashlight is highly recommended for exploring the dark interior, particularly the basement. Visitors should allocate at least 2–3 hours to fully explore the fort and its surroundings. The best time to visit is during winter when the ice on the lake is frozen, allowing direct access by foot. During other seasons, hiring a motorboat from Kronstadt is the only practical way to reach the fort. There are no facilities or services at the fort itself, so bring any necessary supplies, including water and snacks.
To reach Fort Zverev, first travel to Kronstadt. From Saint Petersburg, take the subway to "Chernaya Rechka" (Black River) station, then transfer to a minibus heading to Kronstadt. These minibuses travel along the dike but do not stop on it due to police restrictions. Once in Kronstadt, you will need to arrange boat transport to the fort, unless visiting in winter when walking across the frozen ice is possible. There is no direct public transport to the fort itself.
Common complaints revolve around the difficult access and the lack of amenities. To mitigate these, plan your transport carefully, especially if not visiting in winter, and be prepared for a self-sufficient exploration. The fort is not maintained, so visitors should exercise extreme caution and be aware of their surroundings at all times.