This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

Stockholm's deepest subway station is also a stunning ecological wonder.

A subterranean house of worship carved right out of the bedrock.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

Where you can photograph wild black bears without worrying about becoming dinner.

This tiny Minnesota city tried to secede from the Union as a last-ditch effort to fix its crumbling water system.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

The watery grave of an impractical idea.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

The world's largest floating loon bobs in the lake to kick off an annual festival.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

A community gathering place that once housed half-ton tanks and the World's Fair.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

Make your reservation to have coffee with some kitties.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

This strange statue features a bust of the famous composer plopped atop a woman's body.

This 19th century cyclorama acts like an analogue time machine to a different era.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

The medieval network of canals hidden underneath the city is opened to explorers each year.