According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Where three rails and three centuries of transportation meet.

American artist J. Alden Weir purchased this 60-acre estate for $10 and a painting.

An eccentric playboy's astounding natural history collection.

Home of Philip Johnson, one of the 20th century's most influential architects.

The 570-ton boulder that gave a New Jersey town its name.

This picturesque cottage was the site of Ulysses S. Grant’s final and perhaps most important campaign.

Constrained by time and topography, this civil engineering landmark was constructed 100 feet above Starrucca Creek over the course of a single year.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

This Neolithic passage tomb forms part of a World Heritage Site.

The modern birthplace of Irish freedom.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The ancient tomb acts as a calendar that keeps perfect time.

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

This beautiful site is where the first transatlantic telegraph was sent from.

Come for the history lesson, stay for the mule-pulled boat rides.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

At this site, two historic stone bridges spanning the Sing Sing Kill—one right on top of the other.

This Connecticut ferry has been operating in some form since 1655.