Etharius, your Numenorean curiosity would probably best be quenched with a reading of 
The Silmarillion.  It's a mighty good read.
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				Strange. This Valinor is reachable by sea and is an actual piece of land on the planet?
			
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 Not exactly.  Though it is reachable (only to those permitted by the Valar) via the Great Sea, it is not actually a piece of land within the physical confines of the planet Ea.  In that sense it does somewhat resemble a Judeo-Christian Heaven.  A jolly good place to retire.