This is where the United States National Park system does well, in my opinion. The National Park Service maintains a website for each park with clear maps of the bounds of the national parks (
example), which are submitted to (
UNESCO). They are open year round, with options for individual hiking trails or guided tours, and there is no difference in fees for Americans or foreigners. The only commandment they may not fulfill is number 8, since there are no official tickets for the parks. There are pretty spiffy
complimentary park brochures at each site, however.
Here are several sites that I have visited in the last ten to fifteen years that come to mind:
Carlsbad Caverns National Park: 1, 2, 3, 4 (in the visitor center lobby), 5, 6, 7, 9, and 10
Great Smoky Mountains National Park: 1, 2, 3, 4 (on the wall next to the sidewalk on the south side of the Newfound Gap parking area), 5, 6, 7, 9, and 10
Hawaii Volcanoes National Park: 1, 2, 3, 4 (located outside the Kilauea Visitor Center), 5, 6, 7, 9, and 10
Mammoth Cave National Park: 1, 2, 3, 4 (in the visitor center lobby), 5, 6, 7, 9, and 10
Mesa Verde National Park: 1, 2, 3, 4 (located on the wall outside the Chapin Mesa Archaeological Museum at the Spruce Tree Terrace), 5, 6, 7, 9, and 10
Yellowstone National Park: 1, 2, 3, 4 (located on the basement floor of the museum at the Albright Visitor Center at Mammoth Hot Springs; could it be more prominent? Probably), 5, 6, 7, 9, and 10
Yosemite National Park: 1, 2, 3, 4 (located outside the Yosemite Valley Vistor Center), 5, 6, 7, 9, and 10