Some links for quick access:
Fortification
Trench_warfare#Siege_warfare
Yellowstone
Grand Canyon
Colorado River
Niagara Falls
Niagara River
Great Salt Lake
Mount Rushmore
Crazy Horse Memorial
Time in the United States
USA#Politica divisions
USA#Demographics
mapa USA
Cape Canaveral
Walt Disney World
Los Angeles
San Francisco
Las Vegas
Chicago, Illinois
Washington, D. C.
Washington Monument
Lincoln Memorial
Jefferson Memorial
National Mall
National Air and Space Museum
Library of Congress
Statue of Liberty
New York
Manhattan
World Trade Center
Wall Street
Brooklyn Bridge
United Nations#Headquarters
Times Square
Rockefeller Center
St. Patrick's Cathedral, New York
Metropolitan Museum of Art
Solomon R. Guggenheim Museum
American Museum of Natural History
Madison Square Garden
Macy's
