A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

A historic arena where the Beatles played their first concert in the U.S.

Art deco landmark on the outskirts of Washington, D.C.

An Industrial Revolution-era public work that purified water using nothing but sand.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

The first memorial dedicated solely to the Black troops who fought for the Union.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

This poor little statue is the most vandalized memorial in Washington.

A celebrity from the late Cretaceous period.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

The world's only surviving heavy cruiser has a haunting history.

Sample sweets at an Art Nouveau candy shop that's been in business since 1874.

A memorial dedicated to victims of the Irish Potato Famine who perished while quarantined on this island.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A replica of one of South Korea's National Treasures stands as a tribute to that country's relations with Mexico.

The Father of the Erie Canal has a magnificent grave marker that redefines the term "final resting place."

Once an integral part of Native American life, very few of these communal New England stones have survived to the present day.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

The tallest bridge in California was constructed for a project that was eventually cancelled.

This former boomtown "island" is now submerged below Folsom Lake.

This museum looks at the history of one of America's most famous prisons and most beloved albums.