The astonishing collection of an infamous criminologist.

The world's largest collection of porcelain "veilleuses-theiere," or night light teapots, includes four that belonged to Napoleon.

Elvis's own personal tropical hideaway.

This historic train station has been converted to a locomotive themed hotel.

Walk the whole Mississippi River!

This replica of the Greek structure is in the heart of Nashville.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

The mansion home of author Edith Wharton.

A mysterious collection of stones stand outside a small New England town.

A historic bridge with a lovely acoustic anomaly.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

Over 50 whirling pools left behind from the glacial age.

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

Friction between grains of sand cause a curious "singing" sound.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

An eccentric inventor's castle home with its own indoor weather system.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

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

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

An enormous, inside-out glass globe built in 1935.