When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

More than a century old, this trading post resides in the Navajo Nation.

A giant mascot, a car bomb, and the mafia mingle in the history of a defunct restaurant chain.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

A memorial to the firefighters who died in an industrial disaster is housed in a small public park.

The remains of a boarding school designed to forcibly assimilate Native American children.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This memorial includes fragments from one of the greatest tragedies in United States history.

The site of a popular piano lounge owned by a former world champion boxer is now a place to rent a truck.

An off-the-beaten path cave with an underground lake.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

Visitors to this public park will also find the ruins of an old western fort.

This small memorial is dedicated to the Perryville State Prison firefighters who perished fighting the Dude Fire in 1990.

For those going through a life transition, a place to leave behind a piece of your former self.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

A replica of the flagpole that gave a frontier town its name.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Not far from a popular beach, an unfinished, abandoned mansion for Bulgaria's last communist dictator.

A massive, abstract lookout tower providing a panoramic view of Prague.

Legend says the only thing buried within this magnificent tomb was a dog.