Viral marketing campaign

Main article: Iran Skeleton

Dutch archeologist Casper Shilling claimed to have discovered a giant prehistoric corpse in the Jebal-Barez mountains of Iran. The skeleton was supposedly uncovered by a large earthquake. His website contains many well-made false pictures of the skeleton, and these photos reveal the subject of the hoax to be Phalanx, the thirteenth colossus.

Casper Shilling's site (archived)

Main article: Tsunami Giant

News leaked out over the internet that an incredible discovery appeared on the shore of southern India. A giant creature of undetermined origin was supposedly washed up by a tsunami and became beached on India's shores.

A video was released on giantology.typepad.com (the site is now gone) of a news report on the same beach as the incident. In the background it showed a corpse of monstrous proportions lying in the shallow water on the beach. The giant in the video appears to be the first colossus, Valus.

The fact that this video was not already all over the world, and that the reporter in the video treated it with an apathetic demeanor led some people to correctly believe that this discovery was a hoax.

Snopes has an article on this hoax.

Main article: Underwater Statue

190 feet below the surface of the sea near Australia, scuba divers claimed to have found an enormous statue at the sea floor. Tests apparently revealed that the material the statue was composed of was bone, and that it had been, at one point, alive. The website stated that they believed the giant was a subspecies of eel, but the discovery in the hoax was actually the seventh colossus, Hydrus.

Main article: Siberian Ice Giant

A geologist by the name of Arkady Simkin supposedly traveled to Siberia on an expedition for oil, but what he was said to have found instead was a colossus. A half-frozen ice giant he referred to as Taurus major, the beast in this particular hoax is the second colossus, Quadratus. When the site was online, it had a video of the colossus' discovery, as well as what looked to be a 3-D scan of the corpse, and a picture of a cave painting depicting men hunting the colossus. The video of the scan and the cave painting could be accessed by inputting the correct password (which was 'polaricegiant').

Here is an article about the Siberian Ice Giant hoax.

Main article: Peru Statue

On a site laden with pictures of South American jungle, there was a short movie clip of a girl standing under a tall statue. As the camera panned up, the statue was shown to be of Gaius, the third colossus.