New Holland Island is the only artificial island being a part of St. Petersburg. It was created due to the fact that two canals were dug between the Moyka River and the Neva. Warehouses to store lumber for shipbuilding were transferred here from Holland at the beginning of the XVIII century. First, wooden warehouses and later stone ones were arranged here.
One of the most famous structures of the island is a 23-meter-high arch over the entrance to the canal, which connects two buildings along the Moyka. Another famous building is the XIX century prison, shaped like a tower, which is popularly called the Bottle. Hence the expression "Keep out of the bottle". There are total of a few dozens of buildings on New Holland Island, 11 of them are recognized as monuments of federal importance. The island, which was not accessible for people in Soviet times, is currently open to the public only partially because of the ongoing reconstruction, which will be over no earlier than 2025.