The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A semi-scholarly approach to sex.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

A perfect turquoise lake colored with glacier dust.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Tubing through a cave lit with glowworms is a magical underground experience.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

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

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

The prototype for all Nazi concentration camps.

Art and a pun, all in one.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The fairy tale castle of the "fairy-tale king."

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.