Jachthaven Nieuwboer is a family-run marina and campsite situated on the shores of the Eemmeer, at Westdijk 36 in Bunschoten-Spakenburg.

It serves as a practical access point to the lake and surrounding waterways, offering boat berths for visiting sailors alongside a campsite and glamping accommodations. The marina has held a Blue Flag distinction since 2008.

The site functions as a nautical hub — sometimes called the Nautisch Centrum van Spakenburg — where visitors can rent sloops, sailing dinghies (valken), SUP boards, and bicycles.

It lies roughly 600 meters from the center of Bunschoten-Spakenburg and makes a convenient departure point for exploring the Eemmeer and the Eem river, which stretches some 18 kilometers back toward Amersfoort.