A rare view of a preserved Victorian science museum.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A toxic ghost town sitting atop a massive coal fire.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A park full of outsider art, created by college students studying outsider art.

One of the world's largest model railroads is a mind-boggling achievement.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Mysterious rocks that ring musically when struck.

This Great Depression-era creation was once known as the strangest house in the world.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

World's first "penitentiary," meant to be humane, drove men insane.

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Where America's first doomsday cult awaited the end of the world.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

Arlington Cemetery exhibit dedicated to death and grieving.