Accessible only by boat, this centuries-old island fort never saw troops or combat.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

A mysterious shape catches the eye in this 16th-century painting.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

The last funhouse of its kind, where guests enter through the mouth of an 80-year-old blue whale.

A dollhouse full of taxidermy rodents, each one handcrafted and given a sordid past.

Rumored to have tormented a family in the late 1960s, this toy now resides in a quiet little oddities shop.

"Try not to knock anything over!"

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

These whimsical works of art tell the story of the city's past and present.

Dim sum, served in a grand old theater.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

Painstakingly built dioramas sit unnoticed in a Boston office building.

Designed to honor all those that work as nurses around the globe.

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.