Hundreds of millions of people visit the national parks each year. But where were the most visitors flocking? According to the National Park Service, these are the top ten most visited destinations.

The name "Great Smoky Mountains" comes from the ever-present fog that looms over this mountain range situated along the North Carolina-Tennessee border.

Some of the most popular ways to explore the Grand Canyon include taking in the views at Mather Point overlook, hiking the Rim Trail and hiking Hermit Road.

Some of the park’s most notable attractions include Angel's Landing, Kolob Arch, the Narrows and the Emerald Pools Trail.

This gorgeous mountain range boasts over 350 miles of trails, ranging from easy hikes to expert-level mountain summits, as well as the Trail Ridge Road—the highest paved road in the U.S.

Though it covers around 1,168 square miles of area, visitors spend most of their time in the 5.9-square-mile area of the Yosemite Valley.

Yellowstone was the first national park in the U.S. and it’s not hard to see why. Around 10,000 geothermal features cover much of the park, making it the largest supervolcano in North America.

One of the most popular attractions in Acadia National Park is Cadillac Mountain, which sees the first sunrise in the United States.

Since it runs along the Pacific coast, Olympic National Park is the perfect place for visitors to find the iconic rocky beaches and temperate rainforests that the Pacific Northwest is known for.

The Teton Range, which is part of the Rocky Mountains, is the main attraction to Grand Teton National Park.

Visitors to this park enjoy over 700 miles of hiking trails, the scenic mountain drive along Going-to-the-Sun Road and views of glaciers that are still carving their way through the landscape.