8-Nights South Korea Explorer - Classic from $3,449

Large Jeju Island 60 mi/100 km off the coast of the mainland and 300 mi/485 km south of Seoul has a distinctive history, dress, architecture, language and tradition. Jeju is an extremely popular tourist destination for Koreans, especially honeymooners. Millions of won have been pumped into building deluxe hotels and modernizing infrastructure. Although development has somewhat ended the island's isolation, it hasn't eroded its charms—it is still a great place to visit. Jeju seems a world away from the mainland, even though it's relatively easy to reach—only an hour's flight south of Seoul or a several-hour ferry ride from Busan, Mokpo or Wando.

If you have a choice of when to go, visit in late spring, when Jeju is covered with beautiful yellow yuchaehwa flowers. The island's primary attractions are beaches, fishing, casinos, scuba diving, a weavers' village (Hallim), hot springs and three stunning coastal waterfalls, particularly the Jeongbang Falls at Seogwipo, which plunge almost directly into the sea.

In friendly and festive Jeju, the largest city on the island, there's a Folkcraft and Natural History Museum and an interesting market. About 4 mi/6 km from the city is Moksuk-won, a natural sculpture garden of stone and wood. On the south side of the island, Jeju Folk Village Museum, a collection of traditional houses with musical performances and displays, is well worth a visit.

Also on the island is the tallest mountain in South Korea, Hallasan, which is topped with snow in the winter. There are hiking trails on this extinct volcano, and it has an impressive crater lake. Be sure also to visit some caves: According to legend, three gods emerged 2,500 years ago from the Samseonghyeol (literally "three clans' holes") to create the Jeju Island people.

On a drive around the island, note the black-lava statues of old men, called harubang: Their origin is unknown and the subject of much debate among anthropologists. You can also watch as divers (traditionally women) hunt for clams, pearls and abalone. A dying breed, these incredible women dive into the ocean's depths for long periods of time without using any scuba or snorkeling gear.

Other attractions include saltwater baths (in Sinyang, Hyeopje and Jungmun), the Bijarim nutmeg forest, tangerine groves, the Sanbanggul Buddhist Grotto, the Jungmun beach-resort area and Manjang Cave (the world's longest lava tube). Plan at least two to three days to explore the island.

Known as a beautiful port city with rolling green hills, marina and colorful architecture, Yeosu sits on a peninsula with over 300 smaller islets nearby, 49 of which are inhabited.  Visit the only black sand beach in Korea at Manseongri Black Sand Beach, lined with cafes and restaurants; not far from this is the Marae Tunnel, a natural rock formation and the only of its kind in Korea. For a vista of the surrounding islands that compose the peninsula, visit the Hyangiram hermitage, Dolsan Park, Jasan Park or the Dolsan Bridge for a fun night-time view of the city.

The epicurean capital of Korea and a paper-producing center 125 mi/200 km south of Seoul, Jeonju draws travelers to its sixth-century Geumsan (Gold Mountain) Temple and 40-ft-/12-m-high Buddha. The city also maintains a Hanok village with about 800 traditional houses.

About an hour's drive east, Maisan Provincial Park provides a beautiful setting for the many pagodas of the temple Tapsa (especially in the spring and fall). Other attractions in the area include Deokyosan National Park and the Mireuksa stone pagoda. We suggest one day in Jeonju.