"Sunken Cities" refers to ancient urban areas that have been submerged underwater due to natural disasters, rising sea levels, or human activities. These sites often provide valuable insights into past civilizations, their architecture, and daily life. Examples include Atlantis, a legendary city, and Heracleion, an ancient Egyptian city rediscovered in the Mediterranean Sea. Archaeologists study these submerged locations using advanced technology like underwater drones and sonar mapping. Discoveries from sunken cities can reveal artifacts, structures, and even preserved organic materials, helping researchers understand historical trade routes, cultural practices, and environmental changes over time.