Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Explore the legends surrounding these mythical sea creatures inside this museum.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

This one-room cabin where the young colonel slept during the French and Indian War.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A Civil War Museum with some notable medical antiques.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

An abandoned church gets a second life as a massive beer hall and event space.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The land is home to swimming ponies and a legendary 18th-century treasure.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

An astounding collection of medical specimens, including bits of President Lincoln.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

This free, take-a-book shop seems like a trick but isn't.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The trials and tribulations of marking Poe's grave.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This bomb shelter-themed bar has barely changed since it opened.

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.