The walls of the iconic dome are hollow and have a secret stairway.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

Depending on who you ask, this controversial treehouse is either a charmingly creative child's playhouse or an illegal encroachment on public land.

A striking memorial to the 21 lives lost in an explosion at the Washington Arsenal

The privately owned cemetery that holds room for Washington's finest when they step down from life.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

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

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

The tragic death of 19-year-old Mabel Tainter in 1886 led to the construction of this unique Victorian-era theater in the northern woods of Wisconsin.

The spur that wouldn’t die.

A walk through the historic city center, under the streets of Seattle.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A museum dedicated to the history and exploration of both popular music and science fiction.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

Nuclear reactor created the plutonium used on Nagasaki.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

In the midst of a residential town in Washington exists a property saturated with one man's artistic creations.

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

This parking garage has given itself over to graffiti artists and the neighborhood can't thank them enough.

Continuing a tradition of movie magic on the site of America’s oldest continually operating movie theatre.

This playground sculpture of an icon from the past is dedicated to the children of the future.

Old submarine parts have been converted into faux whale fins.

Craft liquors concocted in an old Seattle warehouse.