1513 Turkish world map, full of European state secrets and snarky commentary.

A marvel of Byzantine engineering under the streets of Istanbul.

The ancient latrines of the Greeks, in all their public glory.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

One of Ireland's most infamous prisons for rebels including men, women and children.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

One part antique store, one part curiosities hodge-podge.

Oldest unrestored plantation house in America that is open to the public.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

"Try not to knock anything over!"

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

The world's largest piece of copyrighted artwork.

The homestead of American patriot John Adams.

Civil War Fort on an island in the Boston Harbor.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

Oldest church in the United States that is still in continuous use.