422 dive sites in 60 countries have records of hammerhead sharks.
59 confirmed by two or more independent sources, 363 reported by one source.
Sites are ranked by evidence: first by how many independent divers logged the animal there, then by how many independent sources confirm it. "Best" here means most independently confirmed, nothing more.
All 30 hammerhead shark sites in EcuadorDive sites in Ecuador
All 61 hammerhead shark sites in IndonesiaDive sites in Indonesia
All 26 hammerhead shark sites in PhilippinesDive sites in Philippines
All 13 hammerhead shark sites in MalaysiaDive sites in Malaysia
All 13 hammerhead shark sites in South AfricaDive sites in South Africa
All 11 hammerhead shark sites in MaldivesDive sites in Maldives
All 28 hammerhead shark sites in United StatesDive sites in United States
All 12 hammerhead shark sites in Timor-LesteDive sites in Timor-Leste
Hammerhead shark sites in Costa RicaDive sites in Costa Rica
All 37 hammerhead shark sites in AustraliaDive sites in Australia
Hammerhead shark sites in New ZealandDive sites in New Zealand
Hammerhead shark sites in SeychellesDive sites in Seychelles
Hammerhead shark sites in MicronesiaDive sites in Micronesia
Hammerhead shark sites in MozambiqueDive sites in Mozambique