1 . Four Unique U.S. National Parks
Mammoth Cave National Park, Kentucky
This national park is the site of the longest known cave system in the world,which is really proper for a park called “Mammoth(猛犸象).” It’s the ideal place for an adventure lover, with about 400 miles of caves and tunnels to explore. One of the most popular sections to visit within the caves is called Frozen Niagara, a special part of the caves that looks like a waterfall frozen in time.
Dry Tortugas National Park, Florida
Even though it’s one of the least-visited national parks in the country, it’s definitely one of the best national parks in Florida. There’s no accounting for Dry Tortugas National Park’s amazing beauty. Located about 70 miles from Key West, this park is made up of several islands that feature blue waters and white-sand beaches, colorful marine life, and the historic Fort(堡垒) Jefferson, one of the largest 19th-century forts in U.S. history.
Bryce Canyon National Park, Utah
If you’re looking for interesting red and pink rocks, you can’t do better than Bryce Canyon. The national park is known for its fascinating rock formations and hoodoos(石林), as well as its starry skies at night. Some of the best places to visit in the park are the Natural Bridge, Fairyland Canyon, or any of the scenic viewpoints throughout the park.
Death Valley National Park, California and Nevada
It’s the hottest and driest national park in the country, but it’s also a place of beautiful desert views and interesting natural phenomena, like the sailing stones on the Racetrack Playa. Depending on where you are in the park the climate can be extreme — it’s home to snowy mountains, dry desert, colorful flower fields, and cool lakes. You might also recognize it as the planet of Tatooine from the original Star Wars movies.
1. What can you visit in Mammoth Cave National Park?| A．Frozen Niagara. | B．Fort Jefferson. |
| C．Natural Bridge. | D．Fairyland Canyon. |
| A．In Kentucky. | B．In Florida. |
| C．In Utah. | D．In Califomia and Nevada. |
| A．Mammoth Cave National Park. | B．Dry Tortugas National Park. |
| C．Bryce Canyon National Park. | D．Death Valley National Park. |
