In 1927, a biplane disappeared while attempting to complete the first non-stop transatlantic flight between Paris and New York City. This memorial stands at the last place it was seen.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Home to the deepest rift anywhere on Earth.

This historic fort spans more the 300 years.

The final resting place of President Chester A. Arthur and hundreds of others from Revolutionary War soldiers to poets, politicians, and painters.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

This picturesque cottage was the site of Ulysses S. Grant’s final and perhaps most important campaign.

At this farm in upstate New York, the former president plotted his reelection campaign.

"A hideous albatross in the Hudson River Valley."

An interesting look into 18th-century American history.

Sculptor Vadim Bora's bronze felines pay playful homage to architectural features no longer extant along Asheville's Wall Street.

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

An original apothecary from 1792.

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

The former home of the 11th president of the United States.