Anger has been expressed at vandalism and graffiti on the Belturbet Dreamscape.
Images posted online show spray paint on the exhibition boards on Turbet Island, while bird boxes were also damaged.
It’s believed it happened over the weekend.
Councillor Brendan Fay appealed for information, asking that if the letters W-A-K painting on the displays could be a clue to identifying the culprits.
The Dreamscape trail is a permanent display on the island, featuring prints by local artist Jackie O’Neill and a series of creatures from the Celtic Fairy Collection.