Lake Sniardwy cruise from Mikolajki, Masuria, Poland 2014 The gateway to the enormous Lake Sniardwy, called “the Masurian sea”, Mikolajki is a smart and cosy town with some delightful red-roofed houses and three bridges. Though tourism has taken over the town with hotels, shops and eateries, the effects of this have not been too detrimental and Mikolajki still manages to preserve its charm. So, whatever your idea of holidays on the lakes, Mikolajki is sure to deliver what you enjoy. The town is situated on Lake Mikolajskie and its marina, the busiest in Masuria. Śniardwy (German: About this sound der Spirdingsee) is a lake in the Masurian Lake District of the Warmian-Masurian Voivodeship, Poland. It is the largest lake in Poland with an area of 113.8 square kilometres (43.9 sq mi). It is 22.1 kilometres (13.7 mi) long and 13.4 kilometres (8.3 mi) wide. The maximum depth is 23 metres (75 feet).