A beautifully rebuilt windmill from the 17th century, situated along the Amstel River.

This landmark honoring a local beer brand is an iconic part of the Minneapolis skyline.

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

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

Resting place of Hollywood's immortals is also site of summer film screenings.

The blinking light atop the iconic landmark has been sending secret messages for decades.

From Japan to Italy, this California park explores the world's cultures through their gardens.

This park is home to well over 100 handmade birdhouses.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

An unexpected and peaceful oasis on a hillside.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

Former private property that was hidden up a trail in the woods with thousands of bright yellow daffodils.

Tucked away in the forest, these giant wooden trolls delight visitors in Charlestown, Rhode Island.

Most famous work of one of Frank Lloyd Wright's sons.

A common entry point to the Griffith Observatory trail holds its own wonders.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

This black shoreline is made up of exploded lava particles.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

A cobblestone alley with an interesting past.