A good chunk of San Francisco -- and the entire SF Bay area -- is landfill used to expand the size of the city. When they built the metro subway going under mar

A good chunk of San Francisco -- and the entire SF Bay area -- is landfill used to expand the size of the city. When they built the metro subway going under market street they discovered a shipwreck and bulldozed through it. There's also a bar - The Old Ship Saloon - built inside a shipwreck https://www.atlasobscura.com/places/the-old-ship-saloon-san-francisco-california https://www.atlasobscura.com/places/the-old-ship-saloon-san-... All of Mission Bay and the Marina used to be underwater: https://www.smallcarbigtimetours.com/san-franciscos-original-shoreline/ https://www.smallcarbigtimetours.com/san-franciscos-original...