32 architectural masterpieces everyone should see in their lifetime

Buildings may be some of the most impressive works of art we have.

After sinking untold sums of money into their construction, we can walk through the finished products and even live inside them.

Business Insider has selected more than two dozen buildings that push the boundaries of structural expression. Make sure to add at least few to your bucket list.

Drake Baer contributed to an earlier version of this article.

The oldest building we know of is Göbekli Tepe in present-day Turkey. Built somewhere around 9500 B.C., archaeologists aren't certain of its function, but it was probably religious.

Since then, humans have built some pretty rad structures. In the past year, we've seen futuristic openings like the Fulton Center in New York ...

... and the Penleigh and Essendon Grammar School in Melbourne, Australia.