Experience the pivotal Civil War battle at this interactive museum.

This map, on display in the Library of Congress, and one of only seven known to exist, is the very first map of the United States.

What may be Boston's finest Art Deco building, located in the city's Financial District.

These structures serve as a memorial to one of Boston’s most ambitious and controversial urban redevelopment projects.

An inclusive, climate-resilient playground honors the life of a young Boston Marathon bombing victim.

Ice cream stand, snack bar, and time capsule of milk conveyance.

A monument first built to honor Confederate soldiers now honors their Union opponents.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

This former studio belonging to a pioneer in photography stands in a picturesque landscape with unique rock formations.

A roadside Statue of Liberty on the grounds of a manufacturing plant.

A tragic mystery left this boy nameless for 65 years.

This large stone residence served as a field hospital during the Battle of Gettysburg between stints as a tavern.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

This free, take-a-book shop seems like a trick but isn't.

This Asian-inspired tower in a lush urban park provides spectacular panoramic views of Baltimore.

On the outskirts of Pennsylvania’s capital city, a reminder of the worst accident in U.S. commercial nuclear power plant history.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

A mural honoring two trailblazing Supreme Court Justices—Thurgood Marshall and Ruth Bader Ginsburg.

Constructed during the roaring 20s, this restored historic hotel recalls its past as home to the first in-hotel distillery.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.