the activity of climbing up buildings and other artificial structures, rather than rocks and mountains

You have heard of bouldering, but perhaps not buildering, in which climbing enthusiasts scale skyscrapers and other steel-and-glass Everests. 你听说过攀岩运动，但也许没听说过攀楼运动，攀楼爱好者攀登的是摩天大楼和其他钢铁与玻璃建造的珠穆朗玛峰。

Buildering often involves climbing without ropes or other safety equipment and is undertaken at night to avoid arrest. 攀楼运动通常不携带绳索或其他安全设备而徒手攀爬，并且在夜间进行以免被捕。