The World Market Center Las Vegas is located at:
495 S. Grand Central Parkway
Las Vegas, NV  89106

For specific driving directions from your location, please use this MSNMaps link.

From the South (or the Strip):

Take I-15 North to Charleston Blvd West (exit 41B).  Follow Loop until it ends at Grand Central Parkway and turn Right.  The World Market Center is located past the intersection of Grand Central and Bonneville. 

From the North:

Take I-15 South to Charleston Blvd.  Turn Left at the end of the offramp and Left on Charleston Blvd.  Turn Left again on Grand Central Parkway.  The World Market Center is located past the intersection of Grand Central and Bonneville.