Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The world's only museum devoted to the wonders of fluorescence.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

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

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.

Also known as the Founding Church of Scientology.

This grisly headstone doesn’t seem to be resting in peace.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

The towering figures were created from the cemetery's fallen old-growth trees.