These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

This small shop walked so America could run on Dunkin'.

This memorial garden is the final resting place of many beloved pets including that of a famous explorer.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

This statue commemorates the importance of hat manufacturing to Danbury, once known as the "Hat City of the World."

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

This general store is more than a century old and home to various oddities and antiques.

British troops and Prohibition couldn’t stop this spot from becoming one of the United States' oldest continuously-run taverns.

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.

An equine tribute in a charming Southern city that calls itself "The Horse Capital of the World."

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

The real-life site of Ichabod Crane's infamous gourd attack.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Steepest flood safety railway in the entire world.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

An occult-y, historic hotel with the World's Largest Ouija board on the roof.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.