[inteleng]

Survivorship bias.

[ljw1001]

sure, but. what things built in the last 20 years do think most likely to last for 2000? I'm not sure I can think of any. Parts of a big highway maybe?

[btrettel]

https://www.nist.gov/el/materials-and-structural-systems-div...

This should provide some information about the durability of stone. I am not aware of similar experiments for other materials.

[inteleng]

I imagine the Brooklyn Bridge will be standing for at least a few hundred more years unless it goes underwater. Plenty of buildings in the mountains should survive.