A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Built by the patriotic residents of Boonsboro in a single day.

Bizarre Cavern.

The birthplace of the Herndon Gas Company.

One of the oldest standing structures in Montgomery County, Maryland.

The last early 20th-century schoolhouse in Fairfax County has galvanized the community and engendered a spirit of service among residents.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

This former train station was once an important shipping depot for the regions farmers.

A park in a small Pennsylvania town is home to an original sculpture by one of its native sons, legendary artist and activist Keith Haring.

In which a local geological marvel becomes a quaint roadside attraction.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

The smallest covered bridge in Maryland.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

This historic sunny-yellow building has an unfortunate connection to the sinking of the Titanic.

Enjoy dishes that founding fathers once ate at this Colonial Williamsburg pub.

At one of the nation’s longest-running professional theaters, the audience used to barter for tickets with produce and livestock.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.