See photos of ancient ruins submitted to National Geographic by users like you. 1 of 19 This photo was submitted to Your Shot, our photo community on Instagram. Follow us on Instagram at @ ...

Stonehenge, Machu Picchu, Pompeii, Angkor Wat, the Acropolis: Even if you've never visited these famous ancient ruins, you know about ... a circular observatory, the Great Ball Court, and the ...

But now an almost decade-long study has revealed it was built by his great-grandfather ... claims the ruins of five fortified ...