This sidewalk tribute honors Colorado's great culinary creation.

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

Modest by day, illuminated majestically at sunset.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

The legendary building that needed ghostly approval before being built.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

This restored colonial house was once home to the botanist responsible for bringing avocados to the U.S.

Believe it or not, the now-ubiquitous California avocado originated in Guatemala.

It's not quite as old as its Roman appearance suggests, but this piece of infrastructure served Guatemala City for centuries.

This museum sits on the site of a decommissioned military communications base.

One of the world's earliest skyscrapers.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A relief that wraps around the concourse of Los Angeles's World Trade Center marks one of the city's failed urban design plans.

Though the original building has been demolished, these massive bronze doors were saved.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

Where pardoned turkeys once spent their all-too-brief final days.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.