Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

6000-year-old site covered in more than 50 megaliths.

Seat of the Duke and Duchess of Devonshire for centuries.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

One woman's Viking Castle on Lake Tahoe.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Go inside to really appreciate this 500-year-old technological masterpiece.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

You can crawl inside this atmospheric 5,000-year-old tomb.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

Antiques by the Bay.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

Home to the "Circus" trees created by Axel Erlandson.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.