The Largest Underground Structures in the World

🏰The UVic Olympic Cavern Hall in Norway is the world's largest underground auditorium and public cavern hall.

🚇The Shanghai Metro is the second largest metro system in the world with a length of 795.5 kilometers and 408 stations.

🏢Subtropolis in Kansas City is a 55 million square foot underground business complex, the largest in the world.

🏥The Sami Offer Fortified Underground Emergency Hospital in Israel can treat up to 2000 patients during armed conflicts.

⛽The Strategic Petroleum Reserve in the United States stores 714 million barrels of oil, about 10% of the country's yearly consumption.

What is the UVic Olympic Cavern Hall?

—The UVic Olympic Cavern Hall in Norway is a large sports facility built 120 meters under a mountain, featuring a hockey rink, swimming pool, and cafeteria.

How long is the Shanghai Metro?

—The Shanghai Metro is 795.5 kilometers long, making it the second longest metro system in the world.

What is Subtropolis?

—Subtropolis is a 55 million square foot underground business complex located in Kansas City, Missouri, and is the largest of its kind in the world.

What is the Sami Offer Fortified Underground Emergency Hospital?

—The Sami Offer Fortified Underground Emergency Hospital in Israel is a hospital that can quickly be converted into an underground facility to treat up to 2000 patients during armed conflicts.

What is the Strategic Petroleum Reserve?

—The Strategic Petroleum Reserve in the United States is a storage facility that holds 714 million barrels of oil, about 10% of the country's yearly consumption.

00:00Introduction to the top 15 largest underground structures in the world.

00:14Description of the UVic Olympic Cavern Hall in Norway, the world's largest underground auditorium and public cavern hall.

00:53Overview of the Shanghai Metro, the second largest metro system in the world with 795.5 kilometers and 408 stations.

01:28Explanation of Subtropolis in Kansas City, the largest underground business complex in the world.

02:10Details about the Sami Offer Fortified Underground Emergency Hospital in Israel, which can treat up to 2000 patients during armed conflicts.

02:55Information about the Strategic Petroleum Reserve in the United States, which stores 714 million barrels of oil.