For those of us lacking a green thumb or the ability to grow anything, the U.S. Botanic Garden is the spot to see an amazing array of living plants from many different areas. Dating back to the 19th century, the museum is divided into three separate sections: the Conservatory showcasing displays and exhibits including jungle, Hawaiian and endangered plants, the National Garden highlighting a regional and butterfly garden and the Bartholdi Park housing the historic, cast iron fountain. Kids can check out the seasonally open Children's Garden to get a better view of plants and play with garden tools. METRO: Federal Center SW