This small Irish village suffered the greatest loss of life when the Titanic sank.

Townhouse facade doubles as an RMS Titanic Memorial.

A crumbling hospital from the 1850s on Roosevelt Island.

Oldest surviving example of a Dutch saltbox frame house in America.

Final resting place for the Triangle Shirtwaist fire’s unidentified victims.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Little Red Lighthouse under the George Washington Bridge.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Holding the most bodies of any cemetery in the United States.

Final resting place of a New Haven urban legend.

"The prettiest love letters in the world" ... or so said Lord Byron.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

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

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A stone wall that mysteriously moved three feet from its foundation.

A sacred lake with thousands of sacred carp and a biblical history.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Two small chapels housed inside an ancient tree.

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Mummified monks and the accidentally interred, in a 17th-century crypt.

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