Remnants of the rich history of fish salting in this ancient Mediterranean port town.

The California capital city once stood 10 feet lower than it does today.

Where the first "expert riders, willing to risk death daily" for the Pony Express were recruited.

Abandoned tunnels dug for the once-thriving sea salt industry on the coast of southern Spain.

This 19th century hydroelectric powerhouse was the first of its kind.

This 19th century train workshop is a treasure trove of railroad history.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

I Street Bridge is the heaviest swinging center bridge in the United States.

A former pumphouse and hydraulic accumulator tower at Llanelli's North Dock

Two 2,500-year-old Phoenician boats found on the coast of Spain, giving incredible insight into the ancient maritime traders.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

Derelict chemical plant on the North Sea is a beautiful industrial ruin.

An oddly shaped tower built to mark the acquittal of Admiral Keppel in a controversial 1770s case.

A small group of islands with a dramatic history.

The largest of only eight working transporter bridges left in the world.

A Sri Lankan tea factory's ironic take on the Los Angeles landmark.

The heroic tale of a remarkable pup who refused to leave her master's side, no matter what.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This may have been the site of a famous and particularly gruesome regicide.

The UK's largest private house was the subject of a long-lasting political dispute.