This beautiful grotto is one of those places where you can't believe you're just outside Austin.

An emerald-green grotto just a short trip from Austin.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This massive oak tree has ties to the first native tribes of the region and the founders of Texas.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

The longest and widest floating bridge in the world.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A wall of chewing gum moonlights as collective art.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

A sliver of nostalgia in Seattle's Viretta Park.

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

A walk through the historic city center, under the streets of Seattle.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.