10 of the strangest places people have planted flags

Jean-François Clervoy.Alexis Rosenfeld/Getty Images

• Throughout history, flags have been used to mark a country's territory or celebrate a nation's accomplishments.
• People and countries have also placed flags in some pretty unexpected places, including the North Pole, under the sea, or on a baseball pitcher's mound.
• Mountain explorers have displayed their nations' flags at the summit of Mount Everest.

Throughout history, a flag has been used to mark a country's claim to land, to mark uncharted territory, and to celebrate a nation's accomplishments. Over the years, people and countries have placed their flags in some pretty unexpected places whether on most remote regions of this planet, on a baseball pitcher's mound, or on the moon.

Celebrate National Flag Day on June 14 by seeing 10 of the strangest places people and countries have planted flags.