Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

See massive fossils that are over 200 million years old in northeastern Arizona.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Most-visited and most-photographed slot canyon in the American Southwest.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

Rustic natural hot springs in the deciduous rain forest.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

The world's longest known cave system.

A fruit-loving town welcomes visitors with a giant melon set against the sky.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

"We Seceded Where Others Failed."

The collection of 80+ pieces created between the years 1100 and 1500 is intended to be seen, heard, smelled, touched, and tasted.

A Circus legend leaves an unexpected endowment.

Florida castle built with aluminum printing plates.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.