Stalin Line is the informal name applied to a defense line that was built by the Soviets along the western border in the 1930s. The site is divided into a number of sections that include restored bunkers with authentic interiors, exhibition areas with military vehicles (mostly post WWII), equipment and a re-enactment battlefield.
The walk past the bunkers, trenches, tank obstacles and a restored section of the old border line can be concluded with a prearranged tank ride (as passengers, naturally).