New Mexico (National Solar Observatory)
Sardinia (INAF Sardinia Radio Telescope)
Davis Mountain, Texas (McDonald Observatory)
New South Wales (CSIRO Parkes Radio Telescope)
New Mexico (National Radio Astronomy Observatory VLA)
Arizona (Kitt National Observatory)
England (Stonehenge--not strictly within this category)
Nevada (Great Basin National Park during an eclipse of the sun)
Canary Islands, Spain (Observatorio del Teide, Solar)