Nydalsdammen is a great park for an outdoor activity near the river Akerselva. Located in Oslo, this picturesque area is a popular spot for families to host barbecues and celebrations or for young adults to lounge in the lush grass with a picnic. With a small ridge nearby acting as a diving board and larger rocks perfect for jumping into the waters from, this park is a great place to cool off from the summer heat. Visitors should be aware of the strong currents at high water levels when swimming in Nydalsdamen.