Seokguram Grotto and Bulguksa Temple

Established in the 8th century on the slopes of Mount Toham, the Seokguram Grotto contains a monumental statue of the Buddha looking at the sea in the bhumisparsha mudra position. With the surrounding portrayals of gods, Bodhisattvas and disciples, all realistically and delicately sculpted in high and low relief, it is considered a masterpiece of Buddhist art in the Far East. The Temple of Bulguksa (built in 774) and the Seokguram Grotto form a religious architectural complex of exceptional significance.

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Seokguram Grotto and Bulguksa Temple are religious monuments and masterpieces of Far Eastern Buddhist art.

Seokguram Grotto is a hermitage that is part of the Bulguksa temple complex. The grotto overlooks the Sea of Japan (East Sea) and rests 750 meters above sea level. It holds some of the best Buddhist sculptures in the world, including the main Buddha. Construction lasted from 742 to 774.

The nearby Bulguksa Temple is the most famous Buddhist temple in Korea and the home to a number of important relics from the Silla period, including most obviously the two stone pagodas Tabot'ap and Sokkat'ap. It also dates from the 8th century, but has been rebuilt on a number of occasions.

The Temple was added to the nomination on the advice of ICOMOS.

http://www.worldheritagesite.org/list/id/736

Changdeokgung Palace Complex

In the early 15th century, the King Taejong ordered the construction of a new palace at an auspicious site. A Bureau of Palace Construction was set up to create the complex, consisting of a number of official and residential buildings set in a garden that was cleverly adapted to the uneven topography of the 58-ha site. The result is an exceptional example of Far Eastern palace architecture and design, blending harmoniously with the surrounding landscape.

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The Changdeokgung Palace Complex is the oldest of Seoul's Royal Palaces. It dates from 1405, and is still very well preserved. For the Chosun Dynasty (1392-1910) it served as the main palace for over 300 years. 

Attached to the palace is the "Secret Garden", a beautiful landscape garden to be used by the Royal Family only. You can find especially imported trees, pavillions, pagodas, stone bridges and ponds. 

One of the buildings in the palace complex still has the old blue tiles, that once were common in Korea. Now Changdeokgung is the only place in Seoul where you still can see this. 

http://www.worldheritagesite.org/sites/changdeokgung.html

Hwaseong Fortress

When the Joseon King Jeongjo moved his father's tomb to Suwon at the end of the 18th century, he surrounded it with strong defensive works, laid out according to the precepts of an influential military architect of the period, who brought together the latest developments in the field from both East and West. The massive walls, extending for nearly 6 km, still survive; they are pierced by four gates and equipped with bastions, artillery towers and other features.

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Hwaseong Fortress is a highlight in 18th century military architecture, combining features from East and West.

This fortress in the city of Suwon was established in September 1796. The Emperor Chongjo moved his seat of government to Mount Paldal in Suwon, and he encircled it with strong defensive works laid out according to the precepts of an influential military architect of the period, who brought together the latest developments in the field from both east and west. 

The site consists of 48 monuments in total: the massive walls, four gates, bastions, artillery towers, and more. It partly was burnt down during the Japanese colonial period and the Korean War, but renovation works in the 1970s restored it to its former glory. 

http://www.worldheritagesite.org/sites/hwasong.html