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

Site of the first pathological and bacteriological research facility in the United States.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

A crumbling hospital from the 1850s on Roosevelt Island.

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

Dictionary Johnson’s favorite feline.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

Wallabies live naturally on this Irish island.

Former wax museum from the 1960s, home to many wax U.S. Presidents and the famous White House miniature.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Meet manatees face-to-face at this zoo for native species.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

The competition: breathe deeply as long as you can.

On Japan's Tashirojima Island, cats are king.

Two thousand feline artifacts fill Malaysia's "Cat City."

Exotic feline breeding compound and conservation center.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Unicorns, elephants, and bears, oh my!

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

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

Visit the monolithic tomb of America's most famous general.