This is old page, updated info is here:
OLD TOWN WALKING TOUR: LEGENDS AND “SECRET TUNNELS”
Two hour walking tour tour is full of legends and will take you off from the traditional tourist route. Tour will end with one hour walk in the passages under the Old Town!
Oleviste church - once worlds tallest building, now just landmark from sea built all by one man;
old towers, rope makers, cannon towers, old prison towers ect.;
The numerous and mysterious passages inside the bastions;
Days and times:
Early booking will guarantee your place on tour. Tour time might change due to advance group bookings made to underground passages.