At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

This fountain was designed to honor the man who helped bring water to Barcelona.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

Marked by the hand of the explorer Henry Morton Stanley.

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

This 17th-century structure is a beautiful testimony to traditional Persian architecture

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

A dreamy mausoleum honors Persia's most famous poet.

The fire inside this temple has burned for more than 1,500 years.

17th century mosque for Shah Abbas' harem.

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

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

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

The palace of the King of Kings, burned by Alexander the Great.

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

The only quarter of the Old City not dedicated to a major world religion.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

A "miracle" that seems to produce more holy fistfights than holy revelations.

The home of the Dead Sea Scrolls is an abstract modernist dream.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

What might be the oldest living tree in London has survived fires, bombings, and estate agents.