The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A Natural History and Science Emporium.

Townhouse facade doubles as an RMS Titanic Memorial.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

On this island, you suck away your garbage via an elaborate pneumatic tube system.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

An unassuming secret door once led to a legendary watering hole.

One of only two commuter aerial tramways in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Venice's "Island of the Mad."