Use the links above to see more photos.

What time is it? ... In fact, what day is it?

Easy questions to answer today -- a glance at your iPhone is all it takes. But 8,000 years ago it was a bit more involved.

This site, just outside Évora, dates back to Neolithic times. It was rediscovered in the 1960s. It's similar to Stonehenge in England but predates it by about 2,000 years.

The 95 stones of this site are believed to have been put in place to align with the sun, the moon, and the stars - an early clock and calendar of sorts. It was used for spiritual and ceremonial celebrations of the great cycles of nature.