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The radio telescope at Irbene was at one time used for anti-espionage purposes. There were various military units and objects in Irbene, including a military housing estate that has now been abandoned. The radio telescope is now run by the Radio Astronomy Centre of the Latvian Academy of Sciences for scientific purposes. Guided tours of the object are available.
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The Soviet Border Guard arrived at Lapmežciems (its border with Ragaciems) in the mid-1960s and left in 1991.  Some 50 military personnel were stationed here.  The military personnel and local residents organised various events and celebrations.  The only thing that worried locals was a radar which was said to cause various problems.  The zenith missiles were dismantled and taken away in 1991.  An apartment building is still on what was then the military base.

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There’s hardly anything left of the zenith missile base which once stood here for the purpose of protecting the western boundaries of the USSR – even specialists would have a hard time finding the location.
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The coast guard facility is not used at this time. Still there is a monument, a border post, and lavatories with wooden toilet paper holders. A good view of the facility can be seen from the high barrier along its southern edge.
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The No. 521 Border Guard post at Ovīši is owned by the Defence Ministry and is closed to civilians. Visitors can only look at the ruins of some buildings in the dunes.
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The so-called Comet Fort was built on the Left Bank of the Daugava at its mouth, not far from the present Daugavgrīva lighthouse. It was built around the same time as the other forts of Mangaļsala (around 1808, although some sources say 1788). There were four Kane-type 152-mm cannons. The defensive batteries at Komētforts and Mangaļsala repelled a British naval attack in the Daugava estuary in 1855. It has to be added that Komētforts is a cultural monument of local importance. If we go along the shore of the sea from the Daugavgrīva nature reserve toward the Daugavgrīva lighthouse and scale the frontal dunes (without going past the sign which says “Closed Territory. Border Zone.”), then we can see the positions of the cannons, as well as underground cellars where munitions were once stored. The territory starts approximately 500 metres before the Daugavgrīva lighthouse and stretches to the lighthouse itself. During Soviet times, the territory was closed to civilians, because many secret military objects were in this area and in Bolderāja.
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The Latvian Border Guard still uses some of the Soviet-era guard facilities that are at this location.
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The former military field hospital is in the park, south from Ventspils Seaside Open-air Museum. A few of the small architectural forms of the building have been preserved.
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The Bauska Castle contains a collection of cast iron cannons which date back to the latter half of the 17th century and the beginning of the 18th century. They were manufactured in the Duchy of Courland. The cannons that are in the garden of the castle were not found there – they were found in different locations in Zemgale. Four of the largest cannons came from Jaunsvirlauka, where they were found on the banks of the Lielupe River opposite Emburga. They are the best preserved weapons of their type in Latvia. The only cannon that was found in the castle itself is currently in its South-eastern tower as a thematic exhibit. When it was being cleaned, two cannonballs were found in the weapons. The local Livonian Order castle is in ruins, but it and its defensive structures, including earthen ramparts that were installed from the mid-15th until the early 18th century, represent an important element of Latvia’s military heritage.
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During Soviet times, Vaiņode was the site of one of the Soviet Union’s largest military airfields in the Baltic States. During the period of Latvia’s independence, the country’s first dirigibles were based here. Eventually their hangars were dismantled and brought to Rīga, where they were used for the Rīga Central Market. They are still there today. Some of Latvia’s first gliders took off from Vaiņode. During the Soviet occupation, the airfield was home to an air defence and destroyer squadron, with 38 SU-27 “Flanker” destroyers on site. After the restoration of Latvia’s independence, the Vaiņode airfield was dismantled in part, and the big plates of concrete that covered the runways and the rest of the airfield were used to improve the Liepāja port. There are still 16 hangars at the airport, and 1,800 of the formerly 2,500 metres long runway are also still there. More information about the airfield can be found at the Vaiņode Regional Research Museum.
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Spilves pļavas tika izmantotas kara aviācijas vajadzībām jau 1. Pasaules kara laikā. 1922. gadā bumbu sabojātā lidlauka atjaunošanu veica Latvijas Republikas Aviācijas divizions Jāzepa Baško vadībā. Drīz pēc tam Spilvē 51 hektāru lielā teritorijā pie Rīgas - Bolderājas dzelzceļa atzara un šosejas iekārtoja arī civilo lidostu, kuru no Rīgas pilsētas nomāja Latvijas Pasta un telegrāfa departaments.

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Nordeķu - Kalnciema kāpu grēdas daļa Kleistu meža austrumdaļā pie Dzirciema ielas. Padomju laikā šeit darbojās divi (vēlāk viens) P - 35 radars, kas griezās ap savu asi. Vietējie iedzīvotāji tolaik šo vietu bija iesaukuši par "Lokatoru kalniņu". Ziemeļos no tā atradās padomju armijas cūku ferma.

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The current Ventspils airport began its life as a military object. Today regular passenger flights to and from Rīga have been suspended, and the airport is only used for small planes.
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The battery is to the South of Ventspils, not far from the Piejūras Park. Work on the battery began in 1939. Today the site is a complete mess, standing out in a negative way from the tidy city itself. People seeking building materials and ferrous metals helped to tear the place down. It’s too bad that this historical location – one that might be of interest to tourists – is in such sad shape, and right at the gates of the city, to boot.
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The communications facility in the forests of Bārta has been abandoned and is not being used other than for dismantling of buildings to obtain building materials.
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This is the rumoured location of a military aviation engine testing laboratory. The territory is now industrial and locked off, and nothing remains to suggest that such a lab was ever really there.
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This facility was used in the past by communications officers, and it was also a training centre. The Ventspils Home Guard Battalion is housed here at this time. The facility is not open to civilians. Along the road there are metal structures which show where the entrance to the facility was once located.
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In October 1948, nationalist partisans who opposed the Soviet regime built a 9x6 m bunker in the forests of Īle for themselves. Five months later, the KGB attacked the bunker. After five hours of gunfire, 15 partisans lay dead, and another nine were captured. The bunker has been restored in commemoration of this event, and it is open to visitors.
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This hill in the Tīreļpurvs swamp is an historical object of national importance – the only area in Latvia that is restricted for cultural and historical purposes. There is unique evidence here of World War I fortifications and the so-called Christmas Battle that was fought here.
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The Lūžņa radio equipment company was part of the Naval Border Guard in Soviet Times. The car park in the centre of Lūžņa offers a fine view of the former military complex. Some buildings are used as apartment buildings at this time.