JustChris has it almost right. Agnostics don’t know where they go when they die. They just don’t know anything except that they don’t know. However, I know the right answer: like everyone else, they don’t go anywhere when they die. Life is like the flame of a candle. It’s either there or nowhere.

To a land of pirates, stripper facatories and beer volcanos. Long live the FSM!

Atheists go to hell, but agnostics go to heck.

They don't know.

Same as everyone else. We don't 'go' anywhere. The components just stop working. When your car breaks down, nothing has gone away. Something has just gone wrong in the system to the extent that the whole system stops working. We can fix it and get it working again. Humans are much more complex than a car but when we understand it to that level we should be able to fix it indefinitely.

Walmart.

I'm not sure.

(See what I did there?)

Back to the earth. If a body is not cremated, the body becomes food for microbes as it rots. All that goo then seeps out of casket and into the soil - which becomes food for plants, earthworms and other creepy crawlies. Eventually, those plants, earthworms and other creepy crawlies become food for bigger animals or become fertiliser for bigger plants. Those bigger plants and animals eventually become food for humans. Humans uses those foods to make more babies.

Neil deGrasse Tyson says it better.

The best explanation given ever on this topic and with lovely details. Spare time to watch it.
Neil deGrasse Tyson on Life After Death

As an Atheist I believe I’m going where everyone regardless of belief goes. Ashes to ashes, dust to dust, food for the worms. I will be cremated and reduced to about 5 pounds of ash in a plastic box. Seen it many times from the crematorium. I hope someone uses it to plant a tree or something. Not at all saddened by this fact. You get one shot in this life. What really matters is did you leave the world a better place while you were here?

I'd like to see a situation where everyone goes down a hallway after they die to meet the grim reaper sitting at a desk. He proceeds to check your name on his list and then directs you to your appropriate afterlife. "Okay Jim, it says here you're a christian but you cheated on your wife. The door to hell is the third one on your right. "Skip you believed in reincarnation so your next life in through that door over there. "Achmed you're a muslim that died in a suicide bombing. Unfortunately the qu'ran is a little foggy on this one but since murder is against the ten commandments you'll have to follow Jim through that door over there." "Dave, Hmm... Says here you were an atheist. No worries, the doorway to oblivion is down the hall, sixth door on your left." "Bill, Umm... it says here you worshipped the norse gods? Yes? okay well that door hasn't been used in a while. It's that dusty one down there next to tarterous just this side of valhalla. No you can't go to valhalla, you didn't die in battle. No Bill, having a heart attack while playing call of duty isn't dieing in battle. Good try though."

To the ground, sewer or wherever

To the cemetery, a lot of them, like most other people.

Disneyworld.

Like everyone else, they become pure energy again and most reincarnate, if they wish.

This is according to research done with 2-6 year old children worldwide who remembered past lives and the details were verified. Many remembered being "ghosts" between incarnations, and choosing their next parents.

Some remembered being animals or even trees. Details of memories from all these alleged past lives were verified.

Hard to say. I don't personally believe our being we've created dies. Having said that what truly happens is a puzzle to me. I just know it has less to do with certain books we don't like on this site.

I like Neil Yougs "Cow Girls in the Sand" version of heaven.

Genesis 3:19 By the sweat of your face You will eat bread, Till you return to the ground, Because from it you were taken; For you are dust, And to dust you shall return.”​

" in the cold cold ground " - Tom waits or "Dust in the Wind" - Kansas or Milwaukee

Nowhere

Nobody knows

"Good girls go to heaven. Bad girls go everywhere".

Nowhere. All metabolic processes cease as does brain activity. We cease to exist. The conciousness is software that stops running and is eventually erased. Enjoy existence.

I believe we break down to our basic elements. Though I do often consider reincarnation.

No where, just like everyone else, regardless of your beliefs.