A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.

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

A replica that won't float away.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The only place for a truly presidential dram.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

An overlooked memorial honoring the local Washington residents who died in World War I.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This black shoreline is made up of exploded lava particles.

One of the smallest towns in the United States.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A prehistoric rock shelter that's literally in someone's backyard.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

This iconic science fiction house still looks like something from the future.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

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

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The highest bridge in America was built for an almost unnervingly small amount of money.