Mystery photo challenge

Where in the world is this port?

• Can you identify this yachting destination?
• Submit your guess in the comments section below
• We'll reveal the answer in a week
• Check the MainSail site for future photo challenges

(CNN) -- Do you know what sailing destination is pictured above? Then take part in our mystery photo challenge.

How it works: We provide three hints to help you on your way and then you share your guess in the comments section below. We reveal the answer in a week.

Hint 1: It has pristine beaches and is a popular holiday destination.

Hint 2: Every year thousands of people journey here to a spring festival dedicated to an ancient sun god.

Hint 3: It is said to be named after a missionary who landed nearby around 1,500 years ago.

Good luck!

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