Tragically destroyed during the Nazi offensive in World War II, the 17th century Saxon Palace in Warsaw is a prominent historical site. Archaeological work being carried out at the site and its remnants have revealed the presence of a mysterious 45-meter (147.6 ft) long tunnel under the ruins of the old palace, which is a whopping 4 meters (13.1 ft) deep! The tunnel has been described as “the most mysterious place on Piłsudski Square in Warsaw”.

See Also:

German whistleblower finds DNA contamination up to 354 times recommended limit in BioNTech-Pfizer vaccine

Pałac Saski company spokesman Sławomir Kuliński explained to Science in Poland (PAP) , that the tunnel is not on any configuration or architectural plans they had, and is thus a complete surprise. In very good condition, he speculates that it was probably constructed in the early 1930s for the purpose of military intelligence. Digging through the rubble filling the passageway, they found coins, ornaments and pottery pieces.

Continue here: Ancient Origins