Greatkraw is right about the soul and all.
Man is a spiritual being, we have bodies and souls and that's how God want's us to be forever. Our flesh can be destroyed, but our souls will never cease to exist. Based off of the life we live, we will be in heaven or hell for all eternity. Jesus was right, of course, when he says we will have eternal life if we believe in him. If we don't, we will have eternal death. Heaven is life the way it was meant to be, and hell is like death. It is definitely a spiritual death. God is the source of all life, light, and hope...hell is a place apart from God, so it must be the opposite of Heaven. It will be real and we will be conscious as we are alive on earth, but it won't be eternal life in a positive sense like heaven. It will be an eternal existence in torment.
Heaven is an eternal existence in peace, love, bliss, joy, and hope in the presence of the Triune majesty. That is the life of eternal life, and thank Jesus for it.