What is the largest underground settlement in the world?
What is the largest underground structure or settlement that we have ever built?
Structural Engineering: How deep are foundations for skyscrapers? What place is best to build cities: underground, underwater, on water, in the air, or in space? How deep was the bunker of Hitler located? What are the three largest craters on Oberon? How did they form? How many floors did the tallest buildings have before elevators? Who designed the first structure of a building? How deep under the ground are we allowed to build? How are underground metros built? Are there any tunnels in Tanjore Big Temple? Where is the tallest building located? How good is rock mechanics & underground structure? Castles: What are some of the greatest fortresses ever built? What is the capacity of a 20,000 square foot building? What determines how many elevators a building will have? How many apartments could a 300m skyscraper contain? What happens in Vascon Weikfield Chambers? I have heard that there is an underground alien base beneath it? Who designed the first shell structure of a building? What are suitable methods and processes of foundation construction for multi storey buildings and basement including description of resources used? What is the biggest arena in the world? What is the quantity of cement, steel, sand and metal and aggregate required for building 1320 cubic foot of wall? Which is the biggest arena in the world? Sunken slab is constructed as roof or floor of toilets or bathroom? I want to build a 1000 sq. ft building. How much stone, brick and cement is required? How much sand, brick and concrete is needed to build a room of 10*10 feet? How fast can a monumental mega building be built? What are these metal cylindrical structures around the UK? Which is the most famous cave in Chhattisgarh? Which is the famous cave of Chhattisgarh state? Is it possible to get a basement built under a house that has already been built? Where is the smallest building in the world, where people live?