This historic electric train has operated with regularity since the early 1900s.

This spectacular bridge is part of an abandoned train line that once connected Mallorcan capital to the southeastern coast.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

This spot in St. Louis, marked with a simple sign, has seen more pro baseball than just about anywhere else in the world.

This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

Who said a biker bar is no place for a taxidermy squirrel collection?

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

The stone circle honors the 19 firemen who perished during the Yarnell Hill Fire.

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 location where the iconic movie character declared it was time to go home.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

An homage to everyone's favorite prehistoric cartoon family.

See massive fossils that are over 200 million years old in northeastern Arizona.

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

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

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

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

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

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.