Beijing’s terrain, surrounded by mountains to the west and north, is considered a natural rain trap, often intensifying ...

Once completed, it will be the world's largest military command center. Already, some observers have dubbed it Beijing Military City, and more than 100 cranes are at work there daily.

Credit: Youtube Helsinki’s underground city, built into solid bedrock, includes gyms, shops, and even a church. It’s designed to house 600,000 people in an emergency.

In an underground river of southeastern China, an “eyeless” cave creature with a “large hump” swam through the dark waters. Its hard-to-reach home kept it hidden — until some determined scientists ...