The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Iconic rock formations that allow for exploration during high or low tide.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Two thousand artifacts from around the world collected by one woman who loved to travel.

This abandoned factory on the Hudson River once churned out a million bricks a week.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

In which a local geological marvel becomes a quaint roadside attraction.

A winding, cliffside stretch of road overlooking the Delaware River.

A walk through the historic city center, under the streets of Seattle.

One of the oldest of its kind.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

Elaborate drama imparts an appreciation for 19th century hardships.

This blowhole is supposedly caused by a trapped monster.

These ancient sacred grounds granted amnesty to those who managed to reach them.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

Dr Barnes' $25 billion private collection of art and arboretum.

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

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.