台湾地下空军基地，隐藏在山洞里的超级工程，三维视角带你了解

Taiwan once built an underground air force base in a mountain cave using a massive $40 billion investment, driven by the need for defense against potential threats after the US severed relations with Taiwan. The base, located in Hualien County of central mountains, was part of a strategic plan to safeguard the island"s security amidst its vulnerable western plains.