Tarpon City is, as the name implies, a dive location where you can expect to see Tarpons. As far as I know there is no other dive site than this one in Curaçao where it is almost certain that you will see at least a few Tarpons during your dive. But on occasion the Tarpons will be everywhere around you as the video of a dive at July 12, 2009 shows.
For guided dives at this location contact Trunkdivers.