An overlooked memorial honoring the local Washington residents who died in World War I.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

A cabinet of curious mathematical models and old calculators.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

This iconic science fiction house still looks like something from the future.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

Historic Hull Street was actually the first street with a proper name in the Boston area.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The remains of an early 1900s dude ranch that operated until the 1970s.

A rare wayfinding portmanteau of “Street” and “Avenue.”

Once the site of speeding horses, now home to picnickers and public concerts.

This historic Victorian hotel has a scandalous history of affairs and murder.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

Final resting place of a 19th century gold prospector and convicted cannibal.

A real flying saucer, contracted by the U.S. Air Force.