The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This historic hotel invented the chocolate brownie.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

This abandoned prison castle has become an imposing gallery of graffiti art.

Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

This recently restored timepiece has stood all around Kansas City.

Community bookshelf of 25-foot-tall book spines.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

This unconventional used book store was once in the news for the surprising act of burning books.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.