[Daily Photo] On the boardwalk in Black Sand Basin, Yellowstone / 黃石公園的步道上

It was a beautiful day. We were on the boardwalk in Black Sand Basin, Yellowstone National Park. In many hot spring or geyser areas of Yellowstone, visitors can only stand on the boardwalk or the observation deck.

此照片拍攝於美國黃石公園內的黑沙盆地。在公園內的許多溫泉或噴泉區，遊客只能在這樣子的步道上行走，不能離開步道。