Jachthaven de Funtus is a well-maintained marina situated on the Vuntusplas, a lake lying east of the Loenderveense Plas and north of the village of Oud Loosdrecht.

With around 135 berths for boats up to seven meters, it serves as a direct access point to the broader Loosdrechtse Plassen.

The surrounding area borders a low-moor swamp notable for its rare plant life and birdlife, with touring routes laid out by Natuurmonumenten.

The marina hosts several on-site operators, including a sailing school and a boat-rental service, making it a hub for nature-oriented water sports enthusiasts in the region.