| 100% | LASCAUX | 7 | Site of a complex of caves in Dordogne, France, containing Palaeolithic wall drawings and paintings |
| 44% | LASCAUX | 7 | Site of ancient cave drawings in France's Dordogne |
| 34% | ALTAMIRA | 8 | Cave of —, UNESCO World Heritage Site in Cantabria, Spain, famous for its Palaeolithic paintings |
| 32% | ALAMO | 5 | The —, mission in San Antonio, Texas; site of a siege and massacre in 1836 |
| 32% | NIECE | 5 | Sibling's daughter ... and a homophone of a city in France |
| 32% | NIECE | 5 | Sibling's daughter... and a homophone of a city in France |
| 31% | SEDAN | 5 | Commune in Ardennes, NE France, site of a 1940 World War II battle |
| 31% | PORTRAIT | 8 | Head and shoulders painting or drawing of a person |
| 31% | POCKETDOORS | 11 | *Barriers that slide in and out of a wall |
| 31% | ARMENTIERES | 11 | Commune in Nord, N France; site of a 1914 battle in World War One |
| 30% | VERDUN | 6 | City in Meuse, France; site of battles in 1792 and 1916 |
| 30% | TROLL | 5 | One of a class of supernatural creatures in Scandinavian folklore that dwell in caves and mountains |
| 30% | POLTAVA | 7 | City in Ukraine on the Vorskla River; site of a 1709 battle between Russia and Sweden |
| 30% | SPLICEDGENES | 12 | What 20-, 27- and 41-Across contain, in a manner of speaking |
| 30% | CENTERCOURT | 11 | Site of a tennis focus match ... and a hint to what's hidden in 16-, 30- and 45-Across? |
| 30% | SEDAN | 5 | Commune in Ardennes, NE France on the Meuse River, site of a 1940 World War II battle |
| 30% | SEDAN | 5 | Commune in Ardennes, northeast France, on the Meuse River; site of a 1940 World War II battle |
| 29% | GIRONDE | 7 | Estuary in France formed by the confluence of the Rivers Dordogne and Garonne |
| 29% | BASQUE | 6 | Member of a people living in the W Pyrenees in France and Spain |
| 29% | BASQUE | 6 | Member of a people living in the western Pyrenees in France and Spain |
| 29% | OKA | 3 | Site of a 78 day, 1990 armed standoff in Quebec between the Mohawk First Nation and the Government of Quebec |
| 29% | GLENCOE | 7 | Site in Scotland of a 1692 massacre of the MacDonalds by the Campbells and English troops |
| 29% | CHIAROSCURO | 11 | Artistic distribution of light and dark masses in a painting |
| 29% | ALAMO | 5 | Site of a historic 1836 battle in Texas |
| 29% | WALLOON | 7 | Member of a French dialect-speaking people living chiefly in southern and eastern Belgium and northern France |
| 29% | PYRENEANIBEX | 12 | A subspecies of the Iberian wild goat, found in Spain and Southern France which went extinct in 2000: 2 wds. |
| 28% | APSE | 4 | Site of a bishop's seat in early churches |
| 28% | IWOJIMA | 7 | Site of a 1945 Allied victory in the Pacific |
| 28% | EAR | 3 | Site of a helix and antihelix |
| 28% | ATTICA | 6 | Site of a historic 1971 event in the carceral-rights movement |