The attic of a four-century-old canal house hides a clandestine church.

A floating cat sanctuary on an Amsterdam canal.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

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

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The site of Paul Revere's historic two lantern warning.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

A six-ton wedding present for the King of the Scots.

The most loyal of little dogs, or a Victorian era publicity stunt?

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A lush indoor jungle fills this bustling Madrid transportation hub.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This ancient Egyptian obelisk still bears the wounds of World War I.

Its collection includes a broad array of social, geographic, graphic design, and political history.

These ornate arches show how the course of the River Thames has changed.

The fences outside some of South London's estates are made from recycled World War II stretchers.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.