Fun Fact:
The "World's Smallest Park" is Mill Ends Park in Portland, Oregon.
The park is 452 square inches is area.
Mill Ends Park is a tiny urban park, consisting of one tree, located in the median strip of SW Naito Parkway in downtown Portland, Oregon. The park is a small circle 2 feet across, with a total area of 452 square inches (0.00007205784 acres). It is the smallest park in the world, according to the Guinness Book of Records, which first granted it this recognition in 1971.