A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

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.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Designed to commemorate the founding of the first settlement in Delaware.

The longest covered bridge in Delaware.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

One of the few remaining covered bridges in Lancaster County.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

This iconic Lancaster everyman has been reading the same story since 1980.

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

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

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.