Legends surround an ancient tree trunk riddled with nails for good luck.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The house that took a plunge into the facade of a museum.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The beautiful baroque library of the Hapsburg empire.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

This cubist Vienna church building looks like some sort of alien stonehenge.

A cult following celebrates the legend that belies this curious podiatrists' office sign which has worked its way into song, literature, animation, and the visual arts.

Space program, pneumatics and more, bits and pieces, for movie sets or the common man.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

From pre-war whiskey cocktails to prohibition-era speakeasy secrecy, this bar has seen it all.

The private clubhouse for the members of the Academy of Magical Arts.

One man's homage to the sun continues to grow like a glass fractal.

America's most famous piece of self-built architecture.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

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

A century-old network of freight tunnels underneath the city's historic business district.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The sun acts as a key that only fits this giant keyhole twice a year.