Thompson is most famous for dredging the Cenote Sagrado (Sacred Cenote) from 1904 to 1910, where he recovered artifacts of gold, copper and carved jade, as well as the first-ever examples of what were believed to be pre-Columbian Maya cloth and wooden weapons.
Thompson pinih kasub saantukan pengedukan Cenote Sagrado (Cenote Suci) saking warsa 1904 ngantos 1910, irika dané manggihin artefak emas, temaga, miwah watu giok maukir, taler imba kapertama sané naenin wénten saking napi sané karesepang pinaka wastra Maya pra-Columbus miwah gegawan kayu.