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
Much of Boston is also land fill. The original part of central Boston (basically Beacon Hill and the North End) was all but an island only connected to other land by a thin isthmus.
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...