Spend a day out in the sun at Nhat Le Beach, where you can swim, sail, or simply take a relaxing walk along the shore. Don't miss Tam Toa Church, a 19th-century structure partially destroyed during the Vietnam War, with ruins still standing today. Lastly, explore the remnants of the Dong Hoi Citadel, which was built by the Nguyen Dynasty.

Dong Hoi is a gateway to some of Vietnam's most spectacular caves, particularly within the Phong Nha-Ke Bang National Park. Explore Phong Nha Cave, renowned for its underground river that you can tour by boat. Another highlight is Thien Duong Cave (Paradise Cave), which is filled with impressive stalactites and stalagmites. You can book an all-inclusive tour from Dong Hoi to these caves for a hassle-free experience.

The quickest and most convenient way to travel from Hanoi to Dong Hoi is by plane, with direct flights taking about 1 hour and 15 minutes. Alternatively, you can take a train, which takes about 10 hours and offers sleeper class options. You can also travel by bus, which takes 10 to 12 hours, depending on traffic and stops. If you choose to travel by train or bus, consider taking a night ride to rest and have a full day for exploring the following day.

The best time to visit Dong Hoi is during the dry season, from February to August, when the warm and sunny weather is perfect for outdoor activities like exploring Phong Nha-Ke Bang National Park. During the rainy season, from September to January, there are frequent showers and occasional storms, but you'll encounter fewer tourists.

When in Dong Hoi, indulge in delicious Vietnamese dishes, such as com tam, which is made of broken rice grains. Other must-try dishes include banh canh (thick noodle soup) and nem lui (pork skewers). Seafood lovers should try the fresh catches at local markets and beachfront restaurants, including dishes like grilled squid and shrimp.