Underground warfare may seem like an ancient tactic, but it's still very much in use One reason Hamas has been a difficult foe for the Israeli military is an extensive network of underground tunnels.

Deep underneath the Turkish region of Cappadocia, Derinkuyu, the world’s largest excavated underground city, stretches not upward toward the sky but deep into the earth. Discovered in 1963, the ...

An underground city and aqueduct was recently found in the ancient town of Abarkuh in Yazd Province, Iran. The Deputy of Cultural Heritage at the Yazd Cultural Heritage, Tourism and Handicrafts ...

During construction work in a city of central France, archaeologists uncovered a tunnel opening and found a system of ancient Roman passageways. Photos show what remains of the underground structures.

Researchers of ancient Egypt discovered “five identical structures near the Khafre Pyramid’s base, linked by pathways, and eight deep vertical wells descending 648 meters underground ...

Groundbreaking discovery in Egypt's Sphinx uncovers 'hidden' mystery that fuels theory of underground city. READ MORE: Hall of Records' under pyramid holds key to ancient Egypt's mysteries, say ...

During construction work in a city of central France, archaeologists uncovered a tunnel opening and found a system of ancient Roman passageways. Photos show what remains of the underground structures.

During construction work in a city of central France, archaeologists uncovered a tunnel opening and found a system of ancient Roman passageways. Photos show what remains of the underground structures.

During construction work in a city of central France, archaeologists uncovered a tunnel opening and found a system of ancient Roman passageways. Photos show what remains of the underground structures.