These days, the woodlands, meadows and lakes of Lithuania's Zemaitija National park are a natural paradise. But deep in the forest, one of the Soviet Union's first Cold War missile sites is a chilling reminder of Europe's brush with the apocalypse.
From the surface the site, now a fascinating museum, looks like a UFO landing pad with the white domes of the silo lids gleaming in a clearing in the Plokstine Forest. What lies beneath is a sprawling underground bunker system whose business was killing.
There is indeed something disturbingly dystopian about these structures. They housed weapons capable of annihilating a significant part of the world. Four giant R-12 (SS-4) ballistic missiles, 23 metres high (including four-metre warheads) were aimed at countries such as Britain, Norway, Spain, West Germany and Turkey.
Each missile was 15 times more powerful than the so-called Little Boy Hiroshima bomb that killed between 90,000 and 166,000 people.
These missiles were part of the Soviet Union's dark arsenal during the Cold War, a communist-capitalist arm wrestle that terrified the world for 45 years from 1947 to 1991 when the Soviet Union collapsed. Soviet deployments of the R-12 missile in Cuba caused the 1962 Cuban Missile Crisis that almost ended in war. Personnel from Plokstine's 79th Regiment participated in the Cuban deployment.
Plokstine was also on high alert during the 1968 Prague Spring. This brief, four-month period of freedom for Czechoslovakia ended when the Soviets invaded with 600,000 troops.
The Cold War world trembled at the edge of a nuclear holocaust. As pacifist physicist Albert Einstein said: "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones." Einstein regretted how his work facilitated the atomic bomb development.
Writer George Orwell coined the term "cold war" in 1945 after Hiroshima and Nagasaki, referring to the bombs as such a threat they would "create a state which was at once unconquerable and in a permanent state of 'cold war' with its neighbours." He predicted "a peace that is no peace".
We drive inland for 90 minutes from our APT small ship, the Hebridean Sky, docked at the coastal city of Klaipeda, to the museum in north-west Lithuania that lies at the heart of Orwell's "peace that is no peace". Lithuania's gentle, bucolic landscape with its fertile fields, storks' nests on telegraph poles, apple orchards and well-kept farms offers an uplifting counterpoint to an altogether bleaker scenario, not just for Lithuania or Western Europe but for the planet.
By 1959, the Soviet Union and America had produced so many missiles the superpowers could have destroyed the world many times over.
Our guide Ruta Vaskyte is uniquely qualified to tell Plokstine's sorry tale. Her family's story replicates the kind of duress under which Lithuanians laboured during the brutal Soviet occupation.
Ruta's grandfather was one of the 10,000 soldiers forced to hand-dig and build the top-secret base. It took seven months. Her father was to be sent to Chernobyl after the 1986