Poland to build watchtowers at Russia's Kaliningrad border

50 metre high towers will be ready to begin surveillance in June according to border police Poland will build six watchtowers to survey its 200-kilometre-long border with the Russian enclave of Kaliningrad, border police have said. The six towers will be up to 50 metres (164 feet) high and ready in June for round-the-clock surveillance, the spokeswoman for Poland's border police told the PAP news agency.