The United States is home to 59 national parks, according to luxury vacation provider Travel To Go. With many diverse parks spanning the country, the accommodation site encourages travelers to opt for vacations at national parks this summer. Travel To Go recommends adventure seekers visit these top four parks:

1. The Great Smoky Mountains National Park
It's no wonder the Smokies are America's most visited park. The park boasts 800 miles of hiking trails through the Appalachian Mountains, with some of the mountains peaks as high as a staggering 6,000 feet. The park is also peppered with many waterfalls, rivers and streams. What makes this National Park so popular is its diversity and the wide array of activities it offers visitors.

2. The Grand Canyon
The second most visited park is said to be one of the Seven Natural Wonders of the World. Depending on the angle and the location of the sun, this park changes features frequently making virtually every photo opportunity unique. Aside from the breathtaking geography of the canyon and the panoramic view, the Colorado River below is nothing to scoff at. The whitewater rafting is second-to-none and runs from challenging to expert. Attracting hikers, the canyon offers a moderate level hike to one that is longer and requires more skill.

3. Yosemite National Park
Ranked as the third most visited park, this central California Park is roughly the size of Rhode Island. Best known for its breathtaking waterfalls, the park is also popular for its granite cliffs, sequoias and wildlife, which bring millions of visitors each year to rock climb, hike, bike and take photos. Travel To Go recommends visiting early in June when the snow melt feeds the waterfalls, however, there really is no bad time to visit the park.

4. Yellowstone National Park
No. 4 on the list is known for its geysers, grizzlies and bison. The most popular geyser, Old Faithful, garners so much attention that traffic jams are not unusual. Yellowstone boasts the honor of being America's first national park. Travelers looking for the best time to visit the park will want to plan a trip after May, as the roads are open all around the park by that time.

Source: Travel to Go