Across
- 1. Historic fortress in Moscow, Russia.
- 3. Historic area in Virginia, USA.
- 4. Incan citadel in the Andes.
- 6. Ancient city carved into cliffs in Jordan.
- 9. Ancient structures in Egypt.
- 13. Atomic bomb dome in Hiroshima, Japan.
- 15. Hindu temples carved into rocks in India.
- 17. Prehistoric monument in England.
- 19. Historic church in Dublin, Ireland.
- 20. Infamous WWII concentration camp in Poland.
Down
- 2. Historic home of Thomas Jefferson in Virginia, USA.
- 5. Ancient city preserved in volcanic ash.
- 7. Ancient citadel in Athens.
- 8. Lavish palace near Paris.
- 10. Ancient amphitheater in Rome.
- 11. Marble mausoleum in Agra, India.
- 12. Ancient Chinese fortification.
- 14. Central area of ancient Rome.
- 16. Ancient Mayan city in Mexico.
- 18. Remote island with mysterious stone statues.