The oldest public library in Ireland.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

The former location of a platform that allowed passengers to safely wait for the trolley.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

The oldest place in Hartford is a cemetery with thousands of bodies stacked beneath the grass.

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.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The vaguely man-shaped root that ate the body of the founder of Rhode Island.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

After the state would not recreate this beloved rock formation, three New Hampshire brothers took things into their own hands.

A humble reminder to Bedford’s past sits hidden in plain sight.

This riverfront statue honors the inventor of the first video games ever sold.

One New Hampshire alleyway has become home to a public gallery of feline art.

New Hampshire's most beloved war hero lived out his retirement in this peaceful homestead.

This humble resting place belongs to one of history's most celebrated restaurateurs.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.