The assailant attacked a man and a woman, both Greek Americans, with a knife on a pedestrian street near an entrance to the Acropolis.
Leaf-peeping season has arrived in the Northeast and beyond, but weeks of drought have muted this year's autumn colors, and sent leaves fluttering to the ground earlier than usual.
Wild video shows the terrifying moment an elephant charges straight at a group of tourists on a safari.
More than half of all National Park Service employees are now furloughed, but Yosemite National Park itself remains partially open.
Sin City's tourism is declining, and some city officials are blaming the Trump administration's tariffs and immigration policies, calling it the "Trump Slump."
Yosemite National Park officials and local businesses say tourism in the Sierra is suffering due to concerns of overcrowding.