GreenKayak offers free kayak trips in Stockholm in return for collecting trash and sharing the experience on social media. The organization says its aim is to reduce garbage floating in coastal waters. It also says it shares knowledge and helps people of all ages get out on the water and take action.

Stockholm has two GreenKayak locations. One is beside City Hall; the other is near the National Maritime Museum. The location near the museum is at Djurgårdsbrunnsvägen 24, 115 27 Stockholm.

The free trip has two stated conditions: spend the paddle collecting trash and share the experience on social media. GreenKayak also invites people to connect with other paddlers through its communities, share pictures and experiences, and invite others to join them. The organization says it may feature selected photos on its social media channels. The Stockholm listing does not give operating dates or hours, or a visit duration.