1. Colorado
   South Carolina
2. Virginia
   West Virginia

Shenandoah National Park is part of the Atlantic state of Virginia (though away from the ocean by a good distance). It shares its name with the great Shenandoah River.

1. Arizona
   Oregon
2. Minnesota
   Texas

The Grand Canyon is justly famous. It gets more than five million visitors a year, and is a UNESCO World Heritage Site.

1. Alaska
   California
2. Washington
   Oklahoma

The park is named for Mt. Denali, the highest mountain in the United States. The mountain's previous name was Mt. McKinley.

1. North Carolina
   South Carolina
2. Tennessee
   both #1 and #3

Great Smoky Mountains National Park comprises more than 500,000 acres. It straddles the border between Tennessee and North Carolina.

1. Florida
   Hawaii
2. Georgia
   Washington

Haleakala National Park is on the island of Maui. It is named for a dormant volcano, which last erupted about 500 years ago.

1. California
   Nevada
2. Utah
   Washington

Yosemite is a park in northern California. One of its best known features is the batholithic rock face called El Capitan.

1. Arizona
   Colorado
2. Nevada
   Utah

Arches National Park is located in the desert and has striking sandstone formations. The most famous of these is the Delicate Arch, which is depicted on Utah license plates.

1. Idaho
   Montana
2. Wyoming
   all of these

Yellowstone is a very popular national park in the mountain West. Few American children, if their parents have any budget at all for travel, are not made to troop through Yellowstone at least once.

1. Alaska
   Arizona
2. California
   Texas

Before it was a U2 album, Joshua Tree was (and still is) a park in the desert region of Southern California. It is named after the distinctive, spiky-leaved trees.

1. Alaska
   Georgia
2. New Mexico
   Utah

This cavers's delight has a number of colorfully named features. Among them: the Balloon Ballroom, Halloween Hall and the Rock of Ages.

1. Arizona
   Delaware
2. Maine
   Oregon

Crater Lake is a popular outdoors destination in central Oregon. Unlike many lakes, it is not fed by any streams -- all its water is collected by rainfall.

1. California
   Oregon
2. Utah
   Wyoming

Zion is one of the smaller national parks, at about 229 square miles. Fun fact: It is home to a large number of bat species.

1. Arkansas
   Florida
2. Nevada
   Virginia

Remember, it's not a swamp! It's a "marine estuary!"

1. California
   New Mexico
2. Wyoming
   Vermont

Death Valley can reach daytime temperatures of 130 degrees Fahrenheit. Even a drive across it should not be undertaken lightly -- make sure your car is road-worthy first!

1. Arizona
   Oregon
2. Oklahoma
   Wyoming

Grand Teton National Park is home to Jackson Hole, a gorgeous valley that is a popular fishing and camping destination.

1. California
   South Dakota
2. Washington
   Wyoming

This lesser-known park is one of the longest cave systems in the world. It has distinctive rock formations called "boxwork" and "frostwork."

1. Arizona
   Arkansas
2. Colorado
   Nevada

This park is named for its concentration of petrified wood. It is also home, though, to beautifully-striated cliffs and rock faces, where its geologic history can be read.

1. North Dakota
   Connecticut
2. Nevada
   Washington

Mount Rainier is part of the Cascade Range, which extends down into Oregon. It's an active volcano, so be prepared to end your picnic a little early!

1. Alaska
   Kentucky
2. New Hampshire
   Vermont

This national park offers you the Green River above to raft on, and a vast cave system below to explore. We'd choose the former, but then, we never got over seeing "The Descent!"

1. Arkansas
   Georgia
2. Oklahoma
   Wyoming

Hot Springs National Park is the rare park set in an urban area. There are a number of bathhouses there, where you can take advantage of the feature that gave the park its name.

1. Alaska
   Connecticut
2. California
   Texas

As its name suggests, this state park is America's northernmost state park. But don't pack your vacation bags just yet. It's more like protected land, having no recreational facilities.

1. Alabama
   Georgia
2. Montana
   Texas

This national park shares a border with Waterton Lakes National Park in Canada. Together they make up the Waterton-Glacier International Peace Park.

1. Delaware
   Maine
2. Ohio
   South Dakota

Another example of a rare national park in a developed area, the Cuyahoga Valley National Park features a number of old homes and buildings. You can also walk the Ohio and Erie Canal towpath.

1. Arizona
   Kentucky
2. New Hampshire
   South Dakota

This park is near Rapid City, South Dakota. Home to both grasslands and desert buttes, it was the location for films such as "Dances With Wolves" and "Thunderheart."

1. California
   Florida
2. Georgia
   Hawaii

Biscayne National Park is named for Biscayne Bay. Scuba diving is a popular activity there.

1. Alaska
   California
2. Maine
   Nevada

Nevada isn't exactly America's capital of geographic wonders, but its Great Basin National Park offers hiking trails and an impressive cave system, the Lehman Caves.

1. California
   Montana
2. North Carolina
   Wyoming

This national park is north of the better-known Yosemite. It's home to charmingly-named features like Brokeoff Mountain and Chaos Crags.

1. Arkansas
   Minnesota
2. North Dakota
   Utah

A sparsely populated state, Utah has more than its share of America's state parks. Like Arches National Park, Bryce is known for its jagged, orange-red sandstone cliffs and towers.

1. New Mexico
   Florida
2. Michigan
   New York

You'll find Isle Royale in Lake Superior, one of the Great Lakes. It isn't very well known, but is well worth visiting, especially in the more hospitable summer months.

1. Alabama
   California
2. New Jersey
   Vermont

The largest and best known of the Channel Islands is Santa Catalina. However, it is not part of the national park, which only includes five of the eight islands, and allows recreational activities but not overnight stays.

1. California
   Hawaii
2. South Dakota
   South Carolina

Congaree National Park is named for the Congaree River. It contains an old-growth forest -- or, if you want to be poetic, "a forest primeval."

1. Georgia
   Florida
2. North Carolina
   Virginia

If you want to go, pack a lunch. The Dry Tortugas National Park is at the far end of the Florida Keys and not accessible by car.

1. Georgia
   Montana
2. North Dakota
   Texas

Texas may be oil- and cattle-rich, but it's low on national parks. Still, it has Guadalupe Mountains National Park in West Texas, which contains hiking and riding trails and some historical buildings.

1. Delaware
   Oklahoma
2. North Dakota
   Minnesota

This Badlands park offers hiking and camping to visitors. You can also see the cabin used by the park's namesake, Theodore Roosevelt.

1. Delaware
   Iowa
   Wisconsin
2. all of these and many more
   every state has at least one national park

Not all states are created equal -- at least where national parks are concerned. Twenty-four states have no national parks, while Alaska, Utah, and California have quite a few. Something to think about if you're both outdoorsy and thinking about relocating to another state!