The longest hedge maze in the world.

The largest greenhouse in the world is home to over one million types of plants.

The twists and turns of this serpentine maze are over 170 years old.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Macabre astrological automaton clock dating to the late 1400s.

A community of collapsing homes more than a mile out from the Florida coast.

An underwater city for the dead.

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

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

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

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

Elevated freight railway turned wildly successful urban park.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

Island where motor vehicles are banned -- home to the only carless highway in the United States.