Rotterdam is a city in South Holland, the Netherlands. Its history goes back to 1270 when a dam was constructed in the Rotte river and people settled around it. Nowadays it is home to the Europe's largest port. A major zoo is situated at the northwest side of Rotterdam, complete with a walkthrough sea aquarium called the Oceanium.
Origami by Ngai Chun Cheung is the traditional Japanese art of paper folding, which started in the 17th century AD at the latest and was popularized outside of Japan in the mid-1900s. It has since then evolved into a modern art form.