UFOs? Not quite. Try Harbourfront, Toronto, Canada, at dusk.
Unusual seating structure - perhaps for a bear. The people seat is underneath.One of the many lichen-covered trees in a nearby park.
Discovered on a fall 2004 walk.

This is my multi-culture/multi-coloured yarrow. The original plant came from the local nursery three years ago, so somewhere along the way, Mother Nature got creative. Each spring when the yarrow returns, the colour spread is a tad different.