The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The 28,000-year-old specimen is remarkably intact.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

The most decorated dog of World War I is preserved in the Smithsonian.

These murals have been brightening a Chicago beach for more than 30 years.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

This narrow street is packed with street vendors and bars selling chicha.

A celebration of Colombia’s premier contemporary artist.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

Colombia's biggest botanical garden contains plants from all across the country.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

This tiny shop has been serving traditional tamales for more than 200 years.

The world's first crowdfunded skyscraper has not gone quite to plan.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

The last remaining location of a drive-up hot dog stand named after a local pool shark.

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

This is the cabin from which John Brown and his men launched their fateful war to end slavery on October 16, 1859.

How did a 2,000-year-old Roman column find its way to a Chicago park?

The last remnants of a lakeside airport that was bulldozed overnight by the mayor of Chicago.