The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

This ornate church has survived Nazi and Soviet occupation, including a short stint as a Soviet-era gymnasium and cinema.

A small museum contains one of the largest collections of ethnic and traditional headgear in the world.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.