The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Slum Settlement Filled With Mountains of Garbage.

A huge museum of much more than just agriculture displayed in a princess's palace.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

In Egypt's expanding metro area, many of the neighbors are dead.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

Home of the infamous Rug Man of Doha.

Qatar's oldest market can trace its origins back more than a century.

This remarkably simple jail went over a century without an escape.

This cabin from the 1850s is one of the first structures built by Chinese immigrants in California.

Haunting and beautiful trees, doomed to die.

One poet's handmade, anachronistic home.

For almost 100 years, this site of peace and spirituality has existed on the California coast.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

California's largest steel arch bridge.

Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A huge musical instrument played by the ocean.

This eagle-topped spire remembers the military commander who snatched up California for the United States.

The stately birthplace of California's statehood.