Restoration works in the gardens of the Royal Castle in Warsaw led to a discovery of a 19th-cent. tunnel leading towards the Vistula river. Existence of tunnels under the river is one of the most well-known urban legends in Warsaw.
Construction workers unearthed a mysterious tunnel during roadworks in Riga, Latvia. The origin of the tunnel became clear when it was revealed that it led to a building that served before 1991 as the headquarters of the Latvian KGB.
A tunnel walled with stones was discovered in the water reservoir in the village of Pedavegi, Andhra Pradesh province, India. The structures is believed to be 1500 years old.
Renovation works at Henryków village (South-eastern Poland) unearthed a previously unknown tunnel. The city is known for numerous monuments, such as a13th cent. Cistercian abbey.
Maintenance workers cutting down a tree near the Książ castle in Wałbrzych (South-western Poland) opened a hole in the ground revealing an unknown tunnel with walls built with bricks.