The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

This memorial honors the performers who died when two trains collided.

A restored 114-year-old railroad station heralded as the most photographed depot in the United States.

The statues honor the state transportation employees who've died while performing their work-related duties.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

This picturesque abandoned home is rumored to be a spite house.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

The smallest covered bridge in Maryland.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The secluded beach getaway from Wes Anderson's dreamy summer romance.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

World's largest Christmas store.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

The unbelievably opulent home built for an infamous newspaperman.

The stone sculpture of an Ottoman soldier is an homage to a lost Providence landmark.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.