Meet Mary Lou Mahaney, a 90-year-old retiree from Silver Spring, Maryland, who is probably the coolest grandma ever.

马里兰州银泉市90岁的退休老太玛丽·卢·马哈尼估计可以称得上是最酷炫奶奶了。

She’s traveled to every continent and visited over 100 countries. She’s also done some seriously adventurous things.今年已经90岁的玛丽奶奶，足迹遍布七大洲，游历了100多个国家。这期间，她还做了许多冒险事。