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

A psychological self-portrait in the form of a giant, segmented head.

Conjoined twins Daisy and Violet Hilton were stars of the vaudeville circuit.

This nine-story building can be played like an instrument.

A sharp bend in a dramatic river canyon cut through red rocks.

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 installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This tiny tropical village was sick of anonymity so the locals made this sign, which actually changed the name of the town.

The mouldering manses of wealthy colonials still pock the streets of a Curaçao neighborhood.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

The solitary grave of a schooner captain killed by lightning while serving biscuits.

Designed to commemorate the founding of the first settlement in Delaware.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

This sidewalk tribute honors Colorado's great culinary creation.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.