Many cultures have built observatories in stone to track the Sun throughout the year
NSO at Kitt Peak: The National Solar Observatory at Kitt Peak is where you will find the largest solar telescope, McMath-Pierce telescope.
NSO at Sacramento Peak: Sunspot, New Mexico is the location for the National Solar Observatory at Sacramento Peak. The site provides current H-alpha images.
Hiraiso Solar Terrestrial Research Center Space Environment Information Service
Big Bear Observatory
Mauna Loa Solar Observatory
Mees Solar Observatory
Kanzelhohe Solar Observatory (Austria)