"The rediscovered tunnels beneath Puebla, Mexico, are an incredible historical find, dating back up to 500 years. This 10-kilometer network, tall enough for horseback riders, was uncovered in 2015 after being considered a myth for centuries. Stretching from Puebla’s historic center to Loreto castle, where the Cinco de Mayo battle took place, the tunnels may have served strategic roles during the Mexican War of Independence and the Puebla War against France. Artifacts like toys, kitchen items, and weapons from the 1800s have been found preserved in the mud."
Actually the dates of artifacts of coastal Aladsk natives (fish trap pegs, and lithographic remains, date back between 20-30,000. There is also new discoveries made with carbon dating man made objects from high mountain areas (which were closer to the water before geological processes). Novice kids who learned random information in proven historically inaccurate textbooks need to shut up or bother to learn the modern facts. Modern science beings all kinds of historical lies to forefront .
*Alaska