Stone labyrinth or meditation/prayer path leading to a tree instead of a minotaur, as Greek mythology would suggest.
from Labyrinths in Stone
Close-up of the Laurel Maze at Glendurgan Garden, Cornwall, England - photo by Bob Krist / Corbis, via National Geographic
Les jardins du château d'Hautefort | Photo by Eric Sander
Flower bulb labyrinth