Underground communications base
This underground base is located in the territory of Adazi military proving ground, which us still used by Latvian army. It is a huge territory but some parts are not used anymore and most of proving ground is accessible by anyone.
This bunker is one of the most well preserved in Latvia. It has two floors, various entrances and tunnels and It is quite big. Pretty easy to get lost there. Owner of this bunker is Defence ministry of Latvia, and there are signs that entry is forbidden in this territory. But iv'e never heard any stories about someone getting caught. Still, before you decide to go to this bunker, make sure it's not on a day when solders have military training.
This bunker is one of the most well preserved in Latvia. It has two floors, various entrances and tunnels and It is quite big. Pretty easy to get lost there. Owner of this bunker is Defence ministry of Latvia, and there are signs that entry is forbidden in this territory. But iv'e never heard any stories about someone getting caught. Still, before you decide to go to this bunker, make sure it's not on a day when solders have military training.