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

The largest outdoor art gallery in the Northwest United States.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

A stack of stones steeped in Irish folklore, much like the hero they're connected to, hide in plain sight.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Considered by many to be one of the most dangerous highways in Alaska.

One of two side-by-side totem pole parks dedicated to educating visitors on Tlingit history and culture.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

The strip club's VIP lounge is actually a rare repurposed Futuro House.

A tribute to a future time when gravity is conquered.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

An oddities shop that dabbles in the deathly and beautiful.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

This museum offers an actual time machine back through Colorado's past.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A medieval castle in the middle of rural Texas.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.