If you wish to remember the identies of the Seven Wonders, you may find this mnemonic helpful.

CAZM GAP

Like this:

If you picture the first six of this list tumbling into a great (and strangely spelled) chasm, leaving only the Pyramid, you can further associate that this great Egyptian monument is the only of the Seven Wonders of the Ancient World which is left to us.


Reference:
Benne, Bart, "Waspleg and Other Mnemonics" (Taylor, Dallas, 1988).