Bicyclists bare all for the World Naked Bike Ride, held in June every year in Portland. But why? What's the purpose of them riding in the nude? And how did this all start? Arran Gimba answers.

The beauty, the lure, the ... lies of Multnomah Falls? Arran Gimba tries to get to the bottom of how tall Multnomah Falls really is and wonders if that really matters.

In the longest episode name in the history of Why Oregon Why, host Arran Gimba tries to understand how the "Umbrella Man" came to be at Portland's living room. Enjoy!

Oregon ranks fifth in terms of breweries per capita. Where did all of this beer come from? How did Oregon come to be known as Beervana? Arran Gimba does his best to explain while participating in Dry January. Rough month.

Why is Mill Ends Park (not Mill's End Park) a big (or little) deal in Portland? Arran Gimba answers with some help from imaginary leprechauns. Really? Really.

It may snow this weekend. So why are we all freaking out?!?! Arran Gimba explains in the final episode of the season.

A quick episode on why Portland is known as Stumptown. Count the number of times host Arran Gimba says, "Fantastic."

It has its own Instagram tag (#pdxcarpet), multiple Twitter accounts, shirts, socks, coffee cups, jerseys, etc. etc. etc. So why did it become so popular? Arran Gimba answers the question.

Where did Haystack Rock off of Cannon Beach come from? Arran Gimba attempts to answer this question while not being attached by tufted puffins. Silly puffins.

"Rip City! All right!" Arran Gimba tells you why the expression became not only synonymous with the Portland Trail Blazers but also the city of Portland.