The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This historic stone bridge has an entire neighborhood clinging to its sides.

This lurid German fountain plots the sad course of marriage from dating to death.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Hill-like structures formed by glaciers and sandy spits of land.

Solar powered Spectacle Island features all-green facilities.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

The world's largest piece of copyrighted artwork.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

A men’s restroom became a sandwich shop.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Bouncing, delightful, mechanical art at the MIT Museum.

This supermarket is suspended 25 feet above an interstate highway.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Every plane, auto, and bicycle in this collection is kept in working order and are regularly demonstrated to the public.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.