One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

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

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

This small-town opera house has appeared much more in national culture and history than its charming setting might suggest.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

See where Bill Murray kidnapped a hapless Punxsutawney Phil.

A fitting attraction for the corn capital of the world.

A monument to the forgotten French explorers and their landmark expedition.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

The oldest structure in a beachside California city was built to serve eight students.

These unusual houses look like giant boats that washed ashore on a residential street.

These fantastically named natural pools look like something out of a Scottish myth.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Drink wine handed out through a window as part of an age-old tradition.

Cascading waterfalls mark the gateway to the ancient burial place of Clan Macnab.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

This single-track road rewards brave drivers with stunning Scottish scenery.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.