A warning sign at the start of the Hermit Canyon Trail stating that getting to the bottom is optional, but getting back to the top is mandatory, Grand Canyon, Arizona, United States of America, North America

Cover, empty white plate and cup, knife on red placemat, optional, Germany, Europe

Sign On The Shore For A Beach Where Clothing Is Optional, Vancouver, British Columbia, Canada

Hawaii, Maui, Makena, aerial of Little Beach and Big Beach.