Places meltingknight Wants to Go

This unique structure is the only one of its kind in Virginia.

This "castle" is actually a limestone and quartz formation hidden along a trail.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

This former POW camp was transformed into a Cold War missile installation.

Get up close and personal at this Fresnel Lens.

This field of concrete was once an active defense site armed with nuclear warheads.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

At Brandy Station, Civil War soldiers left their mark on the battlefield and the walls of this small wooden house.

This homestead was occupied by Union soldiers, who believed the owners were signaling Confederate forces.

A glimpse into the sacrifices of military members during World War II.

An eponymous directional signpost erected by the first president of the United States.

Rowdy rebels fortified this home during the first popular uprising in United States history.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

This museum sits on the site of a decommissioned military communications base.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

This cave was once thought to be a hiding place for the devil.

The Hveragerði fissure runs through this unassuming shopping center.

A unique rock formation that only a few have managed to venture inside.

A rocky outcrop where monks hid their most holy relic while escaping Danish invaders.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

Amazing views of Long Island Sound can be seen from this mountaintop tower.