Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The last standing puppet theater on Long Island.

A mysterious air force base built to resemble a Long Island fishing village.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

A historic lighthouse steeped in rumors of ghost and pirate stories.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

Six peaceful acres in a residential neighborhood dedicated to art and peace.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

The home of the first American-born saint is one of the only curved buildings in New York.

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

Canada's subterranean Cold War museum has doubled as a movie set.

A fake block of cheese remembers a feat of dairy engineering from the Chicago World's Fair.

A small part of lower Manhattan is actually made from a bit of England.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

The site of a tragic massacre that spawned a multimedia franchise.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This park contains a number of standing stones meant to heal and inspire.

This former crime corner has been turned into an eclectic community center.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A church of bones, decorated with 40,000 human skeletons.

Macabre astrological automaton clock dating to the late 1400s.