Green Island Outside Cairns, Australia
If you are visiting northern Australia and travelling on a tight budget, Green Island is about the cheapest way to visit the Great Barrier Reef.
It's right outside Cairns, and up here, the reef is closer to the mainland than further south, making the trips much better value.
It's also cheaper than going out to the outer reef, but there is good enough snorkeling that you can go back home and say you have been to the Great Barrier Reef and seen its coral life. If you don't want to get your feet wet, there are glass bottom boat trips, included in the price of the trips.
The island is also known for its crocodile, in fact the largest captive one in the world. You can visit it in the Marineland Melanesia Crocodile Park.
There is a life-saver-watched beach, and some rainforest walking tracks in the middle of the island.
The island, which is a real coral cay, is tiny - you can walk around it in about 15 minutes.
There is a resort, and a few restaurants, but the cheapest way to do this island is on a day trip from Cairns, costing you less than $100.
There are not many places where you get to the Great Barrier Reef for so cheap.