Escaping in a world of 7 billion people is becoming increasingly difficult, but in Australia - one of the least densely populated countries - seclusion still exists.

The global population passed the 7 billion milestone this week and is expected to hit 9 billion by 2050.

Hayman Island on the Great Barrier Reef is about eight kilometres in circumference, with a population of just a few hundred.

Photographer Lisa Burns, 27, has lived there for the past two years.

Here she paints a picture of what it's like in one of the Earth's few remaining pockets without people.

Snorkelling off the island. ( Lisa Michele Burns )

Beach sunset. ( Lisa Michele Burns )

Aerial view. ( Lisa Michele Burns )

Couple photographed. ( Lisa Michele Burns )

Hayman from above. ( Lisa Michele Burns )