No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

One of the few working locomotive roundhouses in the United States.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

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

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

This striking art museum holds an amazing series of curiosity cabinets.

A unique botanical garden housed in three giant geodesic domes.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

A sliver of nostalgia in Seattle's Viretta Park.

A wall of chewing gum moonlights as collective art.

A colorful architectural gem in Seattle’s uniquely modern Central Library.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

The sign to a demolished amusement park now stands in front of a local library.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

A towering Art Deco movie palace made to look like a Mayan temple.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."