A monument marks the beginning of the longest north-south road in the United States.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

A bit of retro transportation flair preserved in the world's largest department store.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

In memory of the 110 victims of ValuJet Flight 592 that crashed in the Everglades.

An adorably sweet display of sculpted Precious Moments figurines.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

A large collection of motorbikes with some impressive gems.

The gravestone of the suffragist leader attracted extra visitors during the 2016 election.

The nation's second-ever First Lady urged the founding fathers to "remember the ladies."

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

The Grand Canyon of Texas.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A display of magnificent stained glass windows is the first exhibit of its kind.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.