♨️ Yellowstone

Wyoming, United States

Best time: May to September when all roads are open; most close in winter

The world's first national park, home to more than half of Earth's geysers. Old Faithful erupts like clockwork, Grand Prismatic Spring glows like a rainbow, and bison and bears roam free.

Good to know

• Lodges inside the park often book up a year ahead.
• Stay on the boardwalks: the ground is thin and the water scalding.