英语翻译天下第一关——山海关孟姜女庙老龙头

the first Pass under heaven---Shanhai Pass
Meng jiangnu temple
old dragon head

Shanhai Pass --the world's first pass = 天下第一关——山海关
Temple of Lady Meng Jiang = 孟姜女庙
Ancient Dragon Head,Shanhaiguan City = 老龙头
注:
(1)Pass =a mountain pass 要隘/关
(2) "Old Dragon Head"是落伍一点.
"Ancient"(古代的)比较动听/吸引(游客).