A dreamy mausoleum honors Persia's most famous poet.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

These little castles each held thousands of pigeons.

17th century mosque for Shah Abbas' harem.

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.

After Christopher Columbus died, his son built a fancy house to rule from.

Built in 1512, the oldest cathedral in the Americas.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The collection of 80+ pieces created between the years 1100 and 1500 is intended to be seen, heard, smelled, touched, and tasted.

A Circus legend leaves an unexpected endowment.

Former villa and estate of James Deering developed to preserve native tropical forests.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

An early-19th-century hotel with a past that is steeped in the Civil War.

The first singer to cut a country music record is buried in a small graveyard in Atlanta, Georgia.

A statue honoring 44 continuous years of greeting passing ships.

A hidden oasis just two minutes from downtown Atlanta.

One of the world’s largest collections of paper memorabilia chronicles 4,000 years of papermaking.