A monument to the 4,114 Irish orphan girls who arrived in Australia between 1848 and 1850.

A unique collection of diving equipment spanning antiquity to the present day.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

Once a bustling fishing village and trading post, today these Cape Verde ruins provide a home only for seabirds and turtles.

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

This sculpture pays homage to sailors that perished attempting to round Cape Horn.

Alexander Hamilton’s creation caused quite a bit of controversy.

This storybook New England home is actually a decommissioned lighthouse.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

The highway's southernmost spot is a beloved local attraction.

The rare American Civil War-era weapon was never fired in anger.

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

The final resting place of one of Thomas Jefferson's formerly enslaved sons.

During the American Revolution, this mansion hosted failed peace talks between the British and Americans.

A retired subway car stands alone in a field in the middle of Queens.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A small Richmond island dotted with the remnants of hundreds of years of history.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

The largest collection of historic military firearms in the United States.

This hidden gem reveals the history of Britain's first police force.

A burial ground of rusting metal grave markers.