One of only two remaining Victorian-era greenhouses in New York.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

A professional special effects makeup artist’s collection of horror creatures and one-of-a-kind recreations on display in downtown Boulder City.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

At the base of the Spring Mountains, a unique nursery packed with desert plants.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

A Gothic-style abode built to accommodate the church's three resident peacocks.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

One of the last Jazz Age "Wonder Theaters" in New York City.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

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

A very classy 1920s-era bar right in Grand Central Station.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

More than 200 eclectic sculptures surround the artist's home.

A little-known sculpture park of contemporary environmental art in a Lapland forest.

Quality time with reindeer in the stunning scenery of their natural Lappish habitat above the Arctic Circle.

This Stockholm art museum integrates many of its pieces into the surrounding outdoor areas and natural landscape.

This railroad track was so secretive that it was omitted from all maps.

An ancient Viking runestone hidden in plain view in Stockholm's old town.