An aerial view captures the long wooden Busselton Jetty painted with a large blue whale mural extending into clear turquoise ocean waters, Busselton, Western Australia. © Tourism Australia

Busselton Jetty, Busselton, Western Australia © Tourism Australia

A guest looking out from a bed inside a Cruise Whitsundays Reef Suite underwater room at schools of marine life swimming past the floor-to-ceiling windows in the Whitsundays, Queensland. © Cruise Whitsundays

Cruise Whitsundays Reef Suite, Whitsundays, Queensland © Cruise Whitsundays

Two EastSail yachts sailing on the calm waters of Sydney Harbour at sunset, with the iconic Sydney Harbour Bridge silhouetted in the background, set in Sydney, New South Wales. © EastSail

EastSail, Sydney, New South Wales © EastSail

Aerial view of Busselton Jetty extending far into the clear, calm ocean waters from a sandy beach, at dusk in Busselton, Western Australia. © Osprey Creative

Busselton Jetty, Busselton, Western Australia © Osprey Creative

A playful Australian sea lion swimming underwater over a sandy seabed, looking directly at the camera on an Australian Coastal Safaris tour in Eyre Peninsula, South Australia. © Australian Coastal Safaris

Australian Coastal Safaris, Eyre Peninsula, South Australia © Australian Coastal Safaris

High-angle view of two Darwin Adventure Boats speeding along a lush mangrove-lined coastline, creating white wakes in the water, in Darwin, Northern Territory. © Darwin Adventure Boats

Darwin Adventure Boats, Darwin, Northern Territory © Darwin Adventure Boats

A surfer smiling and giving shaka signs while riding a wave at URBNSURF wave park, Melbourne, Victoria. © URBNSURF

URBNSURF, Melbourne, Victoria © URBNSURF

Aerial view of a yellow Pennicott Wilderness Journeys boat cruising through clear, deep blue waters past the lush green coastline of Penguin Island, Tasmania. © Tourism Tasmania / Joe Shemesh

Pennicot Wilderness Journeys, Penguin Island, Tasmania © Tourism Tasmania / Joe Shemesh

A group of people enjoying a scenic sunset cruise on GoBoats on the calm waters of Lake Burley Griffin, Canberra, Australian Capital Territory. © VisitCanberra

GoBoats on Lake Burley Griffin, Canberra, Australian Capital Territory © VisitCanberra