The Firth of Forth is an estuary located in Scotland, where the River Forth meets the North Sea. It stretches approximately 47 miles (75 kilometers) from its source to the sea, and is known for its scenic beauty and rich marine life. The estuary is surrounded by several towns and cities, including Edinburgh, the capital of Scotland, which lies to the south. The Firth of Forth is also famous for its iconic bridges, particularly the Forth Bridge, a UNESCO World Heritage Site, and the Forth Road Bridge. These structures are vital for transportation and connect various regions, making the estuary an important economic and cultural hub in Scotland.