This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Remnants of a storybook amusement park hidden behind a strip mall.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

World's first "penitentiary," meant to be humane, drove men insane.

A layered tribute to the work of mosaicist Isaiah Zagar.

Dr Barnes' $25 billion private collection of art and arboretum.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A semi-scholarly approach to sex.

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

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

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

A Natural History and Science Emporium.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

Little Red Lighthouse under the George Washington Bridge.

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

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

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

The first pet cemetery in the United States.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.