Christ Church Cathedral has recently had a new hall and facilities built adjoining the church, and it was part of the Doors Open presentation. It happens to include a labyrinth, based on the one at Chartres in France. Of the Protestant denominations, I'm only aware of Anglican churches occasionally having these, while they're more common in Catholic churches, particularly in Europe. I spent time walking the path towards the core- and felt quite refreshed and centered after doing so- all the more so since being out in the rain that day for a good while had left me feeling knackered.
Below the cathedral is a smaller chapel, which includes a model.
It also includes a wide passageway called a columbarium, a place where cremated ashes in urns can be interred. I liked the dignity of the place.