That fresh smell after rain is called petrichor.
When raindrops hit dry soil, they release plant oils and geosmin from bacteria, creating that rich, earthy scent.
Fun fact: the top of the Bankers Trust building in NYC (1910-1912 AD) is an imitation of the Mausoleum at Halicarnassus (353 and 351 BC)
Early twentieth century architects were SUCH NERDS