Cairns

Cairns is considered "the Gateway to the Great Barrier Reef."
The city is right next to the ocean, however people do not swim in the ocean because of crocodiles. Instead, the government created an enclosed area of ocean water called the "Lagoon," downtown.

the mudflats where crocodiles frequent

low tide

the area around Cairns is very tropical, has mountains, and rainforests

the Lagoon