The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

An ideal wedding spot that is almost too ideal.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A daily replay of the experiment that proved the rotation of the Earth.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This dramatic rail curve was once the target of a failed Nazi attack.

A local prank turned town icon.

This elaborate towering structure was once famed for its revolutionary height.

The oldest farmer's market in America is so ancient it was approved by the King of England.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

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.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The first American department store, and home to the largest operating musical instrument in the world.

This might just be the TARDIS of bookstores.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This erect, phallic geological spire wasn't always named so domestically.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

The only road through the heart of Glacier National Park.