Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

The world's longest known cave system.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Enormous lake at the bottom of a unique cave system.

Plymouth's huge yet little-known memorial to the Pilgrims.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

Mural fragments and various sculptures honor the longtime artist.

A 60-room castle constructed by a horse-racing heir.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Dine like an American revolutionary at Colonial Williamsburg.

Home of the only civilian casualty at the Battle of Gettysburg.

This natural sea cave hides a small wonderland of natural turquoise beauty.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A 400-square foot model of historic Quebec is the playing field for a state of the art light and sound show.

This monster fiberglass crustacean stands watch over the self-proclaimed "lobster capital of the world."

A mysterious spot where the laws of gravity seem not to apply.

A small Canadian town founded as a refuge for Loyalists following American Independence.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

Quite simply the largest tree in the world (by volume).

For almost 100 years, this site of peace and spirituality has existed on the California coast.