The website serves as a searchable interface for the World Database on Protected Areas (WDPA), compiled by the UNEP World Conservation Monitoring Centre. Each protected area in the database has its own page on with details such as its IUCN category, year of designation, and more. The following list reflects which protected areas with a marine component have been viewed the most times on the website, as measured by unique page views. The site went live in October 2010:

1. Pelagos Sanctuary for the Conservation of Marine Mammals in the Mediterranean

  • France, Italy, and Monaco
  • Unique page views: 506

2. Mikawa Wan Quasi National Park

  • Japan
  • Unique page views: 290

3. Sudoeste Alentejano e Costa Vicentina Nature Park

  • Portugal
  • Unique page views: 277

4. Great Barrier Reef Marine Park

  • Australia
  • Unique page views: 255

5. Galapagos National Park & Marine Reserve

  • Ecuador
  • Unique page views: 241