Life is full of transitional states. Birth and death being 2 of many. Since I'm not religious/spiritual, the answer would be into the ground hopefully with a natural burial. Metal coffins, which is what the majority of people are buried in now, are too well sealed to add anything to the surrounding environment, which makes sense since embalming fluid is hardly environmentally safe. Natural burial allows the body to naturally break down and feed the surrounding fauna. From that aspect, we do live on, but only as a food source.
That's different per country. Over here metal coffins are not allowed. Full embalming isn't either.
You can get thanatopraxia which is a mild way of embalming, using different fluids that are degradable. But you don't have to choose this either.