"One of biggest mysteries of modern archaeology might be solved in the coming days—and all eyes are on a huge circular structure that lies beneath an ancient Greek mound." Source: The Daily Beast.
Comment: It doesn't seem likely that Alexander's buried in the incredible tomb currently being excavated in Amphipolis. After Alexander's death, one of his generals, Ptolomy I Soter, newly appointed satrap of Egypt, snatched Alexander's body while it was being transported back to Greece and had it buried, i.e., put on display in a public tomb, first in Memphis and later in Alexandria, where Caesar (and many others) viewed it later.
Snatching Alexander's body was an act of propaganda. The corpse was like a talisman, a sacred object and symbol of power and authority. By possessing the body, Ptolomy could claim to be Alexander's legitimate successor.
So Alexander is probably buried somewhere in Egypt, but to this date, his tomb hasn't been discovered. One interesting possibility raised in this story is that Ptolomy may have substituted a dummy for Alexander's real body, which was then buried elsewhere, possibly in Greece. This story is apparently an ancient rumor, but it would be incredible if it turned out that Alexander's remains had somehow made it back to Amphipolis.