An architectural oddity hides in plain sight on this iconic London bridge.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's smallest police station is barely the size of a phone booth.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

For over a century, it was a crucial center of mental health treatment and also the source of many local legends.

These curious caverns have been home to mushrooms, gangsters, and disco.

An old soap company building now houses one of Minneapolis’s oldest independent non-profit art galleries.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

This old residential building was once the largest flour mill in the world.

One of two giant blue cockerel statues erected with an intentional double meaning.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

The only arched bridge made of stone on the entire Mississippi River.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

When flour explodes, it's not a pretty sight.

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

Inside this museum resides a boot fit for a giant.

One of England's most famous churches hides a pair of little known architectural treasures.