I have not lived in that area so can’t help you with specific recommendations, but I do suggest not letting the presence of a labyrinth deter you if it’s your only objection. Labyrinths have been used by Christians for centuries. The one in the cathedral of Chartres (France), for example, has been in place since about the 13th century; it is said to symbolize the long and winding path to salvation. Other 13th century labyrinths can be found in the cathedrals of Reims and Amiens (both also in France). Walking the path of a labyrinth can assist a person in spiritual contemplation often engaged in as part of a retreat.
That said, it’s absolutely possible that a labyrinth, even one installed in a church or the garden of a retreat center, can be used for purposes that contradict Catholic teaching so intent is important. If you will be forced to use the labyrinth, or even just encouraged to do so but in a way incompatible with the Catholic faith, that would obviously be cause for concern so in your place I would visit the site to get a feel for how the labyrinth might be used there (books that are not in line with Catholicism for sale in the shop or available in the library for use by retreatants would be a red flag, as stated by @fide above). The mere presence of an on-site labyrinth, however, would not be enough by itself for me to pass on a retreat at that particular destination. Again, it depends on why it’s there and how it’s intended to be used.
I hope you find a place suitable for your retreat. God bless!
