What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

A bizarre house filled with an astounding array of collections.

Theater has had many different incarnations but has survived the ravages of time.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

The palatial McDonald's that inspired Wesley Willis.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

This historic hotel invented the chocolate brownie.

All of Chicago's wood-paved streets are long gone but two alleys remain.

Cemetery featuring rare glass-fronted columbarium.

The 606 is a decade in the making.

An antiquated German apothecary on Chicago's North Side.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.