There must be a pun in this haystack somewhere...

An 18th-century home taken over by antique automatons and musical machines (Closed).

This single room has survived the centuries with almost no deterioration.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A museum dedicated to "science, history and the arts" little changed since 1915.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

Unicorns, elephants, and bears, oh my!

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

Three prestigious academic collections come together to create a world-class natural history museum.

Impossibly life-like natural history models created out of glass by a father and son.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

An enormous, inside-out glass globe built in 1935.

The ancient tomb acts as a calendar that keeps perfect time.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

America's oldest archaeological site or a muddled case of wishful thinking.

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

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over 50 whirling pools left behind from the glacial age.