The world's only known button museum.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

Two flush headstones mark the only known graves to be embedded in an airport runway.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

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

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

A New England curiosity cabinet, one hundred years on.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This New England drive-in was built to straddle the border between two states.

The world's oldest and largest museum of mass transit vehicles.

The headquarters in Salem doubles as an occult art gallery.

The idyllic colonial home of the artist behind the famous portraits of George Washington and Thomas Jefferson.

The place where the great marine explorer first learned to work underwater is not where you'd expect.

A lonely memorial to the Challenger Space Shuttle, honoring the astronauts who died in 1986.

Site of the graveyard vine believed to be a curse on a family from the 1800s.

These whimsical works of art tell the story of the city's past and present.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

Dedicated to the explorer who opened Japan to the West.

The former home of the man whose radical ideas changed the nation.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.