Largest Roman Catholic church in North America.

This lovely pocket park is one of the most under appreciated in D.C.

A derelict bit of transportation infrastructure hidden in the woods.

A historic arena where the Beatles played their first concert in the U.S.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A painfully obvious spy house sits right across the street from the Russian Embassy.

The most accurate timepiece in the world.

The national park was once a plantation estate.

Decades before the scandal, this staircase on the river was a literal "water gate."

The second largest maple syrup producer in the U.S. runs a high-tech operation.

Retirement home where the actress who played the Wicked Witch of the West passed away.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

A distillery built on (and above!) mobster Dutch Schultz's Prohibition-era underground moonshine business.

An unassuming island in the middle of the Hudson that hosts campers, including Aleister Crowley.

Believe It or Not, Ripley once called this chiseled mountainside “New York’s Mount Rushmore”.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

An abandoned dollhouse factory.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

One man's swirling six-acre monument of stone.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

This abandoned factory on the Hudson River once churned out a million bricks a week.