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

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

There aren't too many operational funiculars around, but Pittsburgh has two!

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Yo, Adrian!

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Millions of numbers carved in glass represent the tattoos forced upon victims.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Dispersed across 45-acres, 39 structures house a massive collection celebrating American Folk Art.

A massive sustainable farm designed by the mastermind behind Central Park.

This small-town pizzeria won the Hollywood lottery.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The world's largest public collection of PEZ memorabilia.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.