A hidden oasis in the heart of Minneapolis is also an Important Bird Area.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This gold-winged spire celebrates the first true flight around the world.

Granting the right of way to ships over surface traffic since 1917.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The ritual has been performed uninterrupted for nearly 700 years.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The potters' quarter is packed with artists sculpting clay gods with mud from the sacred Ganges river.

A normal, unassuming pedestrian overpass has been the demise of many, many trucks.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

A community gathering place that once housed half-ton tanks and the World's Fair.

The longest and widest floating bridge in the world.

"The Reptile Man's" very own roadside zoo features an albino alligator.

This working class sculpture pounds his hammer all the livelong day.

This offbeat trailer park is home to vintage peddlers, local artists, indie makers, and more.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.