We don't yet have a full map but here's what has been shown as far as the environment in Forza Horizon 3.
gamescom update: see post #140 and #149 for the scale of the map and pink lake features shown in new
gameplay footage:
Originally Posted by: ConverseFox 
Per the official announcement, we know that Forza Horizon 3 takes place in Australia.
http://www.forzamotorspo.../en-us/news/fh3_announceQuote:The Land Down Under
In Forza Horizon 3, Australia is the home of the Horizon Festival. As one of the most beautiful and varied countries in the world, Australia makes the perfect setting for Forza Horizon 3 and the team at Playground has translated the Land Down Under into the largest and most diverse open world ever seen in the Forza Horizon series. Just like the real place, the Australia of Forza Horizon 3 is absolutely massive – in fact, it’s is twice as big as Forza Horizon 2’s map. More importantly, Forza Horizon 3’s vision of Australia captures the spectacular natural beauty, the tremendous diversity, and the environmental variety that makes the country one of the most popular tourist destinations in the world.
Australia’s natural beauty abounds in Forza Horizon 3. From exploring bioluminescent caves that look like something out of a science fiction movie, to skipping across the beach and skimming the ocean surf as you speed past the famed “Twelve Apostles” limestone stacks, there are driving experiences in Forza Horizon 3 that players have never seen before in a Horizon game. Forza Horizon 3 is packed full of incredible diversity. There’s the famed dusty Outback that will be a test of any car’s abilities; blasting through the dense and lush rainforests; testing your driving skills on city streets – the unique driving experiences in Forza Horizon 3 seemingly never end.
Per art director
Benjamin Penrose:Quote:“We have a bunch of unique ecotypes in the game that are all representative of real locations in Australia. We have rainforests, we’ve for the Gold Coast’s Surfer’s Paradise as an urban city environment, we’ve got sections of Coober Pedy, some gorge areas including Ormiston gorge, and some general outback loveliness. So there’s lots of variety in terms of environment that we’ve crammed in this time and they’re all genuine Aussie locations.”
Game map image stitched from YouTube
In-game shot of the Twelve Apostles:
https://en.wikipedia.org/wiki/The_Twelve_Apostles_(Victoria)
Surfer's Paradise skyline:

Smaller town:

Rain forest:

Dam:

Rock formations:

Sand dunes:

Solar panel field:

Shipwrecks:

Pink lakes in the West:

Edited by user Sunday, August 21, 2016 8:09:28 PM(UTC)
| Reason: Not specified