Thousands of unmarked, sunken graves in a pauper's cemetery.

A World War II-era sign in Valletta is a reminder of when Malta was besieged so severely that food needed to be rationed.

A pile of earth left over from a water supply project was converted into an anti-aircraft installation during World War II.

Before this area was filled with luxury homes, it was a movie star's 160-acre ranch and a gangster's hideout.

A memorial dedicated to the 29,000 Istrian freedom fighters of World War II.

After a battle with Congress, Webb C. Hayes installed the gates of the White House on the fence of his father's Presidential Library and Museum.

The site of a dress rehearsal for D-Day that ended in disaster.

This is the cabin from which John Brown and his men launched their fateful war to end slavery on October 16, 1859.

A monument dedicated in memory of the over 100,000 civilian deaths during the liberation of Manila in World War II.

Inspired by the work of a German artist, these brass installations commemorate the lives of enslaved Vermonters.

Hidden from the ground but visible from above, this arrow target in the New Forest is part of Hampshire's rich World War II history.

The menus here are a love letter to the culinary history of New Orleans.

A history of the U.S. military, with a focus on Pennsylvania's contributions.

A tiny slice shop hides down an unmarked hallway in a Las Vegas casino.

These purpose-built WWII air raid shelters, which run half a kilometer under the town of Mellieħa, are among the longest in Malta.

The rusting hulk of a Soviet warship sits on a Polish beach.

For over two centuries, this palace served as a residence for the Holy Roman Inquisition's leaders, a courthouse, and a prison.

This unassuming bridge is most likely one of Michelangelo's unfinished masterworks.

The future civil rights leader grew up in this Alabama farmhouse.

The location of the site of one of the defining battles of feudal Japan is being fought over by two neighboring cities.

This little-known wall in Southampton stands as one of the most unique and personal monuments to D-Day.

This historic hotel invented the chocolate brownie.

Cemetery featuring rare glass-fronted columbarium.

The French leader's hat sits in a glass case at the oldest restaurant in Paris.