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.

This is the only Soviet military object of its type and scope in Latvia – a long-distance communications base which was supposedly used to maintain contacts with Soviet naval ships and submarines all around the world. The facility had a central tower and six perimeter towers, each more than 200 metres high. Some of the towers remain in place and are used for mobile communications. It is rumoured that the Soviet communications system was never once turned on. The complex at Upīškalns can be seen by driving down the Skrunda-Kuldīga road. It is some 3 km before the Kuldīga ring road, at a populated location called Raidstacija.

The Cape of Kolka is freely accessible to local residents and tourists today, but the border guard facility still serves its purposes and is not open to civilians.