Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

An emerald-green grotto just a short trip from Austin.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Rippling sand dunes frozen in the Arizona rock.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A kaleidoscopic warehouse-maze of handmade neon signs.

France's most famous cemetery, with some of its most curious tombs.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Most-visited and most-photographed slot canyon in the American Southwest.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Dramatic river bend surrounds a natural red-rocked pedestal.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

The flow from this waterfall sometimes comes out of springs below its rim.