SpaceX is still working on their next rocket Starship. After blowing up MK1 and SN1 they built several test pieces and tested them until they popped.
They are now building what they have called SN3, and started pieces for SN4.
Most of SN3 is in the building with the other piece in this video to go onto the bottom of that stack SOON (provided Corona virus doesnt find a way to shut them down to).
1st prototype fliying called Hoppy:
MK1 Goes Boom during pressure test:
SN1 goes explodes, implodes, explodes during pressure test:
MK1 full prototype mock up (not CGI):
LINKY TO MORE PICS
Bulk head test module being cryogenic tested with engine vibration simulator unit attached.