the activity of spending time in towns and cities going into buildings and places that are hidden or no longer used, and that may not usually be open to the public or legal to visit

The exact origins of the urban exploration movement are unclear - the intrepid have always been tempted to explore the forbidden. 城市探索运动的确切起源尚不清楚——勇敢者总是想探索禁区的。

Urban exploring often involves going into underground or off-limits areas. 城市探索通常涉及进入地下或禁区。