1-Watch The Sky and The City View.

You can enjoy the panoramic view of Seoul from the Namsan Seoul  Tower which is decorated with colorful lights at night time.

You can watch ocean and Busan view from Busan Tower which is 120 meters high.

Busan Tower View
Lotte World Tower Seoul Sky

Lotte Tower is the 5th highest building in the world. There is a observatory at the 123rd floor of Lotte Tower. You can watched Seoul view from the glass-floored observatory with a feeling like you are walking in the sky.

2-Make A Night Bus Tour At Busan.

You can enjoy two hours ride on a double decker tour bus in Busan and go to spots like Gwangalli and Haeundae.

3-Visit Night Markets.

There are night markets in different citys in Korea. You can enjoy variety of foods and each market has unique cultural performances and events.

In Seoul,night markets are open on weekends at Yeouido Hangang Park, Banpo Hangang Park, Cheonggye Plaza.There are food trucks you can try tteokbokki and night snacks like meat and lobster.

Busan Bupyeong Night Market, Daegu Seomun Night Market, Jeonju Nambu Night Market  are the other night markets in Korea.

4-Make A Ferry Tour At the Hangang River

You can enjoy the night view by taking a ferry cruise on Hangang River.

5-Watch the Wonderful View of Ocean From A Cable Car

Songdo Maritime Cable Car runs at a height of 86 m above the sea. You can enjoy the ocean and Busan view for 8 minutes and 30 seconds from it.

Source: Muslim Friendly Routes in Korea, Imagine Your Korea