Regional Unit of Pieria: 4 Ports/Marinas (according www.marinetraffic.com)
https://www.esc.guide/regional-unit-of-pieria
https://www.esc.guide/municipality-of-dio-olympos
https://www.esc.guide/municipality-of-katerini
https://www.esc.guide/municipality-of-pydna-kolindros
https://www.esc.guide/municipality-of-pydna-kolindros