nature studies:
Washington Monument
nature studies:
Washington Monument
nature studies:
Washington Monument
nature studies:
National World War II Memorial
nature studies:
Washington Monument
nature studies:
National World War II Memorial
nature studies:
National World War II Memorial
nature studies:
National Museum of the Native American
nature studies:
U. S. Capitol
nature studies:
Masons working
nature studies:
Exhibition Hall
nature studies:
Out of Many, One
nature studies:
Yucca
nature studies:
Interrogation bench
nature studies:
Cacti
nature studies:
Taking root