Spiders have moved in to dine on the bugs drawn by the lights. Wasps have built nests to eat the spiders. And a “community” of dark biofilm has spread over the surface of the marble like spots on a giant leopard.
Lichens have sprouted on the stone. Rain has pummeled the roof. And 76 years after it was dedicated in the midst of World War II, the Jefferson Memorial has become a miniature and unsightly ecosystem.
https://www.washingtonpost.com/history/2019/08/20/bugs-bad-weather-have-had-their-way-with-jefferson-memorial-now-park-service-is-fighting-back/