Tien Mwana Cave, yokhazikika mkati VietnamPhong Nha-Ke Bang National Park, akuyembekezeka kulandiranso alendo pa Disembala 21 pambuyo pa kutsekedwa kwa zaka zitatu kuti akonzenso kwambiri.
Phangalo, lomwe ndi gawo lofunikira kwambiri la phanga lodziwika bwino la Phong Nha, lidakonzedwanso ndikulikonzanso, ndikulonjeza kuti alendo adzapeza zambiri.
Lili pamtunda wa mamita 200 kuchokera pakhomo la Phong Nha Cave, Tien Son Cave amafuna kukwera masitepe 583 koma amapereka mphoto kwa alendo ndi chiwonetsero chautali wa mamita 980.6.
Malo abwino kwambiri a phangalo lomwe lili pakati pa phirili limapereka malingaliro odabwitsa, okhala ndi 200 metres pamwamba pa nyanja ndi 120 metres pamwamba pa mtsinje wa Son.
Poyamba anapezeka mu 1935 ndipo kenako anatsegulidwa kwa zokopa alendo mu 2000, phanga ili ndi mbiri yakale. Zosintha zaposachedwa pakutseka zikuphatikiza mayendedwe okonzedwanso, malo opumira, ndi madenga atsopano opangidwa ndi maluwa, kuwonetsetsa chitetezo ndi kukongola kokongola.
Chosangalatsa kwambiri pakukwezaku ndi mlatho watsopano wamagalasi, pafupifupi mamita 100 pamwamba pa mtsinje wa Son, wopereka mawonekedwe ochititsa chidwi a malo ozungulira, kuphatikiza minda ya mpunga, chimanga, ndi nzimbe.
Alendo amatha kuyenda munjira yozungulira mkati mwa mphanga, ndikuyang'ana njira ziwiri zosiyana zokwana mamita 400 iliyonse. Mapangidwe achilengedwe a geological, osemedwa kwa zaka mamiliyoni ambiri, akuyembekezera mkati mwake, akupereka chithunzithunzi cha luso laluso lachilengedwe.
Matikiti a Tien Son Cave amagulidwa pamtengo wa VND80,000 ($3.28) paulendo uliwonse, ndikuloledwa kwaulere kwa ana osachepera 1.3 metres.
Boti loyendera malo, lokhala anthu 12, likupezeka pa VND550,000 ($22) ulendo wobwerera. Kwa oyenda omwe akufuna kufufuza mapanga onse a Phong Nha ndi Tien Son, ndalama za bwato zimakhalabe VND550,000 paulendo uliwonse.