Dating back to the 1800s, two imposing buildings in Michigan have had countless transformations over the years.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The writing studio of an American adventure author, built in the style of a medieval castle.

Inside the Wayne County airport is an amazing collection of lights and sounds.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

An extraordinary mixture of natural beauty and man-made phenomena.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

In the midst of a residential town in Washington exists a property saturated with one man's artistic creations.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

If it wasn’t for an innovative use of quilts during a crisis, the city of Panguitch might not exist today.

The notorious Wild West outlaw was raised in this unassuming abode.

During its heyday, 72 one-ton buckets from this dredge bore into the Powder River excavating vast gold deposits.

Get your cosplay on at Milwaukie’s only Medieval fantasy-themed mead hall.

The largest wooden building in the world now houses a fascinating collection of aircraft.

The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

A Roman-style column in Oregon hides a spiral staircase inside.

This sandstone mansion was the home of two of Oregon's most important pioneers.