2021 Niuafo'ou
BEST of the SMITHSONIAN
45c - The National Museum of Natural History.
50c - The National Museum of Natural History - By its centennial, 2011, it had welcomed almost 300 million visitors and housed over 126 millionobjects.
70c - The Enid A Haupt Garden, covering over 4 acres, opened in 1987 as a part of the redesigned Castle quadrangle.
90c - The National Museum of African American History & Culture.
$1.00 - The Folger Rose Garden; a four season garden opened in 1998.
Issued May 24, 2021 - Set of 5 Stamp Souvenir Sheets
MINT NEVER HINGED
