Founded as a refugee camp, now a popular tourist spot.

This circular Iranian jail was once a political prison run by the country's secret police.

17th century mosque for Shah Abbas' harem.

These little castles each held thousands of pigeons.

The cathedral stands in New Jufa, Isfahan's Armenian quarter that was established in 1606.

Ancient structures used to make and preserve ice in the deserts of Persia.

Long before air conditioning, Persian architects found an ingenious way to cool off.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

Named after a legendary garden called Eram in southern Arabia, built by order of Shaddad, an Arab king who wanted to compete with Paradise.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

This ancient fortress in Iran was once the oldest and largest treasury in the world.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

Possibly the world's largest coin stands just outside of a Canadian science center.

An experimental, automotive replica of Stonehenge.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A unique market that brings together various goods and cultures.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.