The United Nations Educational, Scientific, and Cultural Organization on Thursday expressed great concern over the fate of World Heritage Sites in Ukraine as Russia continued its military invasion of the country.

They can be as annoying as mosquitoes, buzzing high overhead and encroaching on the national park experience for visitors on the ground. At Hawai'i Volcanoes National Park, the sounds of helicopters hauling "flight-seers" can intrude on those watching, and listening to, the eruptions within the Halemaʻumaʻu Crater of Kīlauea volcano or hiking Kīlauea Iki Trail.

More than four decades after a large swath of Big Bend National Park was identified as potential wilderness, there's a grassroots effort under way to convince Congress that now is the time to transform it into official wilderness.

Beginning On Tuesday you'll need to pay an entrance fee or show an annual pass to get into Vicksburg National Military Park in Mississippi and Louisiana.