Here, AD rounds up famous buildings from around the world that you’ll be glad you’ve seen when you look back on your travels.

Looking back through time, the world’s tallest man-made structure was the Great Pyramid of Giza in Egypt. It held that position over 3,800 years, until the Lincoln Cathedral was built in 1311.

In honor of 9/11, here's a look at the World Trade Center, a popular tourist destination and financial hub, before the tragic ...