If there is dense foliage like the Amazon, it can be grown over so that even large cities and pyramids would blend into the area (being covered by trees) in less than 100 years.
Covered, but unlike ancient constructions made out of large stones, limestone and marble, modern constructions are using (composite) materials that wouldn't last more than a few hundreds years before starting to disintegrate, especially when soaked with humidity.
Look at Chernobyl site. It took only 50 years for the buildings in the exclusion zones to fall apart.
With the shit quality that goes into the newest of buildings, those would be the first to dissolve into nothing.
Everything built after the mid past century will go first.
Most European buildings built with stones by Whites before the jews fucked things up and started WWII will last for a much longer time.
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