Finally taking the time to document: The "Mars Caves" (found on Google Earth:Mars)

(some are more obvious than others -- each cave located in the "center" of each screenshot)

The caves run in a fairly straight line for ~150 miles (~245k km)...

Cave Entrances (High Level):

Screen Shot 2017-10-09 at 7.26.02 pm.png

Each cave opening is ~300 feet ( ~92 meters) wide...

Cave Entrance #1

Latitude: 41°46'55.85"N
Longitude: 23°53'1.24"E

Screen Shot 2017-10-09 at 8.04.32 pm.png

Cave Entrance #2

Latitude: 43°47'19.86"N
Longitude: 23°43'39.23"E

Screen Shot 2017-10-09 at 8.13.44 pm.png

Cave Entrance #3

Latitude: 44°18'20.38"N
Longitude: 23°41'9.71"E

Screen Shot 2017-10-09 at 8.14.46 pm.png

Cave Entrance #4

Latitude: 44°20'49.18"N
Longitude: 23°40'58.77"E

Screen Shot 2017-10-09 at 8.15.44 pm.png

Cave Entrance #5

Latitude: 44°23'59.91"N
Longitude: 23°40'43.51"E

Screen Shot 2017-10-09 at 8.24.58 pm.png

Cave Entrance #6

Latitude: 45° 0'37.45"N
Longitude: 23°37'29.12"E

Screen Shot 2017-10-09 at 8.18.46 pm.png

Cave Entrance #7

Latitude: 45° 2'34.76"N
Longitude: 23°37'17.95"E

Screen Shot 2017-10-09 at 8.19.52 pm.png

Cave Entrance #8

Latitude: 45°42'39.48"N
Longitude: 23°33'30.57"E

Screen Shot 2017-10-09 at 8.20.55 pm.png

Cave Entrance #9

Latitude: 45°46'4.46"N
Longitude: 23°33'12.14"E

Screen Shot 2017-10-09 at 8.21.36 pm.png

Cave Entrance #10

Latitude: 45°56'55.28"N
Longitude: 23°32'13.24"E

Screen Shot 2017-10-09 at 8.22.21 pm.png

SOURCE: You may verify these images by downloading Google Earth and then selecting "Mars" in the planet selector:

Screen Shot 2017-10-09 at 7.41.41 pm.png