35 architectural masterpieces everyone should see in their lifetime

• The world may have only a handful of designated wonders, but it's full of architectural marvels that are worthy of anyone's bucket list.
• Some of these must-see sites date back centuries, while others have been around for just a few years.
• We've rounded up the architectural masterpieces that everyone should see in their lifetime.

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

After untold sums of money are sunk into their construction, we can walk through the finished products and even live inside them. Older structures offer a window into the past, while newer buildings provide a sense of where we're headed.

Here are some of the most ambitious projects from architects around the world, whose works span thousands of years.

SEE ALSO: 16 of the most beautiful schools in the world

The oldest building we know of, built around 9500 B.C., is Gobekli Tepe in present-day Turkey. 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.