tunnels

There is something extremely fascinating about the world right under our feet. The darkness was dark, the suffocating fear, the cold feeling of the nape of the hair when entering

Dark and old places are the top candidates for mysterious stories, legends or simply unfounded words about

At 56km long and taking 17 years to build, the train tunnel under the Alps connects the city of Erstfeld and Bodio of Switzerland, which was unveiled a few days ago as the world's

18,000 man-days were mobilized to dig tunnels with a total length of more than 2,000 meters of military wonders on Quang Tri fire land.

Besides Cu Chi Tunnels, few people know that Saigon still has a resistance system of tens of kilometers right in the inner city.

In 1963, at the Drinkuer village in Cappadocia plateau 360 km from the ancient capital of Ankara - Turkey, a farmer when digging soil in his garden accidentally discovered a cave

The tombs from prehistoric times in Europe can be built for many purposes, not just the resting place of souls from many millennia ago.

Cheops Pyramid is the oldest and only work remaining among the 7 wonders of the ancient world, also known as the Great Pyramid. It was built in 2560 BC as a tomb for King Cheops,

A newly discovered equation related to deep holes can solve the conflict between quantum mechanics theory and general relativity of modern physics.

The Seikan Tunnel is a 53.85 km railway tunnel in Japan, with a length of 23.3 km underground.