The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

Portlandia is the second-largest copper repoussé statue in the United States.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

The seamy, underground secrets of Portland's criminal past.

A historic bridge no one is allowed to cross.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This collection of hand fans doubles as a history of femininity.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

This water tower commemorates the invention of the transistor on this site in 1947.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

A monument commemorating the discoverer of radio astronomy.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

An abandoned stretch of highway, deteriorating next to the operational one.

An abandoned, rusty old relic of railroad history stands at attention over the Cuyahoga River.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

The angel of death appears to weep black tears at this grave marker.

An extraordinary mix of Phoenician, Roman, early Christian, and Byzantine ruins beautifully set overlooking the Mediterranean.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

The smallest covered bridge in Maryland.

This covered bridge was used by both Union and Confederate troops during the Battle of Gettysburg in 1863.

Long before the Battle of Gettysburg occurred, dinosaurs roamed the area and left their footprints on this bridge.