Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

Hundreds of mossy stones engraved with bits of philosophy, literature and random musings.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Marta Becket's hand-painted theater in the desert.

"Only the devil could play golf here."

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

An alley covered with 20 years of bubble gum.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

Quite simply the largest tree in the world (by volume).

The unbelievably opulent home built for an infamous newspaperman.

A local dialect born in the late 19th century is only spoken in this isolated California valley.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

One woman's Viking Castle on Lake Tahoe.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

The southernmost outpost of the Russian Empire in colonial America.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

California's own majestic geyser is powered by a subterranean volcano.

Wheels of chrome by the thousands adorn this California Historical Landmark.

A sculpture dedicated to Napa Valley's oldest mineral water company.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.