NEW YORK, NY.- The National September 11 Memorial & Museum announced today that more than one million visitors have come to the 9/11 Memorial Museum since opening on May 15.

Visitors have traveled to the Museum from all 50 states and more than 130 countries from around the world. The nations represented in the greatest numbers include the United Kingdom, Canada, Germany and Australia.

"To achieve this milestone after being open for just four months is truly remarkable," 9/11 Memorial President Joe Daniels said. "We have been honored to welcome thousands of people who are so closely part of the history we present, from 9/11 families, first responders, recovery workers, and survivors, to some of the world's most important political and cultural leaders. Our visitors are demonstrating that the 9/11 Memorial Museum is a place that every American, and people from around the world, simply must see when visiting New York."

"We have received an overwhelmingly positive response from our visitors, who are spending on average more than two hours in the Museum," 9/11 Memorial Museum Director Alice Greenwald said. "To have one million people come through our doors after being open for only four months is a testament to how deeply the subject of 9/11 resonates for the broad, general public and how much interest there is in the unique way this Museum presents the history."

Helping the Museum achieve this incredible milestone was Karen McDaniel of Myrtle Beach, S.C., the millionth visitor who came with her husband. She was greeted by Greenwald and a Memorial plaza cobblestone was dedicated to her to remember the special day. The 9/11 Memorial cobblestone campaign is an opportunity to sponsor a permanent piece of the Memorial plaza individually or as a gift.

The 9/11 Memorial has had more than 15 million visitors since opening on the 10th anniversary of the attacks. To learn more about the Memorial and the Museum, download the new Explore 9/11 app for free at the Apple App Store.

Explore 9/11 is a guide to understanding the Memorial and Museum, the World Trade Center site and the history of 9/11. The app's primary features are map and story modes. Users are taken on a content-rich landscape of the Memorial and inside the Museum using clickable hotspots to reveal photos, videos, audio and more. In story mode, users can explore this content that is organized in chapters.