Our "By the Numbers" articles provide interesting (and often surprising) statistics for selected parks. Click the hotlinks below to read the 13 BTNs that Traveler published this year.

Golden Gate National Recreation Area.  You'd expect one of the world's largest urban-oriented parks to generate impressive statistics, and indeed it does! For instance, did you know that volunteers annually contribute more than 400,000 hours of service to the park?

Jean Lafitte National Historical Park and Preserve.  Numbers tell the story of a park that offers visitors an abundance of recreational choices spread among half a dozen cultural sites and natural areas in the river corridors and bayous of the New Orleans day-tripper zone.

Stones River National Battlefield.  This park preserves sites associated with an extraordinarily bloody Civil War battle fought at Murfreesboro, Tennessee  on December 31, 1862 and January 1, 1863. Did you know that more soldiers were killed or wounded in this battle than at Shiloh or Antietam?
 
Homestead National Monument of America.  This very special Nebraska park contains, among other things, America's oldest homestead. Did you know that it also has the country's second-oldest restored tallgrass prairie?

Klondike Gold Rush National Historical Park.  Do you know why "two" has important meaning in the context of Klondike Gold Rush National Historical Park?
 
Glacier Bay National Park and Preserve.  You probably know that this famous Alaskan park has magnificent glaciers, high mountains, and lots of watchable wildlife, but did you know that this park is larger than Yellowstone?

Voyageurs National Park.  This northern Minnesota park's waterway system, consisting of four large island-studded lakes connected by narrows, was once the route of the French-Canadian voyageurs. Did you know that nearly 40 percent of this park is water-covered?

Little Bighorn Battlefield National Monument.  Did you know that fewer half of the men that Custer brought to the Little Bighorn were killed in the battle? Did you know that 24 Medals of Honor were awarded for bravery above and beyond the call of duty during the Little Bighorn fight?

Apostle Islands National Seashore.  Despite the name, this Lake Superior shoreline park actually contains 21 islands ranging in size from 3 acres to nearly 16 square miles. 

San Francisco Maritime National Historical Park.  When it comes to publicity, this park pretty much flies under the radar. Would it surprise you to know that it attracted around four million visitors in each of the last eight years?

Fort Sumter National Monument.  During the Civil War, this harbor fort was struck by over 47,000 projectiles with an aggregate weight of about seven million pounds.

Kenai Fjords National Park.  One of the park's signature features, the Harding Icefield, is the only major icecap located entirely within the United States. Do you know how many hundreds of square miles of land lie buried under the Harding Icefield?

Carlsbad Caverns.  Did you know that Carlsbad Cavern's aptly-named Big Room has a floor area the size of six football fields?