Man-made wonders are ones that were built by accient people and symbolized the whole locations they stand.

However, there are many ways these can be damaged.

Firstly, many of the man-made wondersr have been destroyed in wars. It is an essential procedure to destroy enemies' wonders as an act of superiority claim.

Secondly, time and weather can cause great damage to any kinds of wonders, even man-made or natural. 

Thirdly, tourism is one of the worst form of destruction for any types of wonders. It depends greatly on awareness, education and level of preservation. 

In any types or forms, damage have to be avoided or reduced at all cost in order to maintain the world's wonders.