Tucked away at the end of An Ninh Dong commune, in Tuy An district, lies the mesmerizing Da Dia reef. This beguiling natural wonder in Phu Yen features black basalt rock formations that rise majestically along the sea. Located just 21 miles from the city center, the drive to Da Dia reef is not only convenient but also a delightful experience, thanks to the gentle sea breezes and the picturesque hometown scenery.

A Unique Geological Phenomenon
Da Dia reef is renowned for its unique trait, which is hard to find anywhere else in the world. Recognized as a National Heritage site in 1998, this extraordinary place captivates visitors with countless black polygonal rocks that stack up along the seaside. These rocks were formed millions of years ago as a result of volcanic eruptions, creating a pitch-dark wall that resembles piles of plates.

The name Da Dia, meaning “rock plates,” perfectly describes this geological characteristic. From a distance, the rocks emerging from the sea resemble a massive honeycomb. The striking black color accentuates the vibrant turquoise shade and the crystal-clearness of the water, forming a harmonious yet unique fusion. To fully appreciate this remarkable spectacle, be sure to wear sturdy shoes for climbing and consider using a drone for a breathtaking aerial view.
Discovering Da Dia Reef
Da Dia reef is a popular tourist destination, particularly from May to July during the peak season. However, by setting out early, you can still enjoy the serene beauty of this place and capture amazing pictures. With an entrance ticket costing just 1 dollar, Da Dia reef is also budget-friendly, making it an ideal spot for travelers seeking a unique landscape and Instagrammable photos.
Useful Information
- Location: Ganh Da Dia, Phu Yen
- Best for: All visitors
- Entrance: N/A
- Hours: Daytime visits are recommended
- Distance to city center: 36.0km (22.4 mi)
Experience the awe-inspiring Da Dia reef and let its natural wonders take your breath away. Plan your trip to Phu Yen and immerse yourself in the beauty of this extraordinary destination. For more travel inspiration and information, visit the Travel Guide.