Embark users take note. Australia is not a destination to be trifled with when it comes to the epic scale and variety of adventure activities. With nearly 60,000 km (almost 37,300 miles) of inviting coastline in a country distinguished as the largest island on Earth, swatches of ancient rainforest in which the ubiquitous koala roam, and the highly romanticized Australian Outback, you'll be hard pressed to find a piece of Australia that doesn't speak to you.
Broken down geographically, western and northern Australia get little fanfare from international tourism, but are most approximate to many of the accessible natural landmarks at the “red center” of the continent. Think great beaches for swimming and water-sports off of the coast or crazy natural landmarks like the aptly named Wave Rock or the Pinnacles rock formations in Nambung National Park. Any diver or snorkeler should attempt the off-the-beaten-path reefs off of the western coast (Rottnest Island, for one), but if you're truly serious, you're going to find some way to the Great Barrier Reef, whether you are hopping among the Whitsunday Islands or taking a boat into the Coral Sea. The diversity of marine plant and animal species, great and small, are everything you've heard and more.
Queensland is going to be your best bet for extreme adventure, particularly in and around Cairns (rock climbing, bungee jumping, skydiving, etc.), and although the national parks here don't host any record-setting geological monuments, the combination of rainforest, waterfalls, and quality hikes will be enough for anyone to stake down a tent and stay for a while. It may also serve as a jumping off point for the aforementioned Great Barrier Reef.
Surfers will love the whole eastern and southeastern coast, whether you throw your board down in the aptly named Surfer's Paradise or strike out for a number of water sport-friendly beaches near Sydney and Melbourne. Speaking of the two most populated cities in Australia, most travelers will end up here. You'll find some great skiing, varied distance hikes, eminent rock formations, and even national parks that will provide excellent views of these two beacons of modern civilization. If you want the best of Victoria, a half day's drive on the Great Ocean Road is mandatory for its coastal rock formations, while a trek like the Great North Walk gives fantastic off-the-beaten-track impressions of New South Wales.
All of this and we haven't even mentioned Tasmania, which should be near the top of any adventurer's bucket list, especially if indigenous species and a massive natural landscape that has felt the minimal impact of the human footprint intrigues you. There is rarely a travel destination to match how far away from civilization you can find yourself in Tasmania.
Hungering for more? We have a ton of Australia travel pictures and videos, while our city level pages cater to more specific travel ideas. Start digging around for the kinds of activities you'd like to see on your itinerary and start planning that Australia trip!