Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

One of the now-less-hidden floral gems of the "Emerald Necklace."

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

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

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

One of the most scenic falls in Massachusetts has a history of death and grim legend.

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

The headquarters in Salem doubles as an occult art gallery.

A collection of full-size movie monsters opened to the public.

Dim sum, served in a grand old theater.

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.

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

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

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

A beautiful Victorian-era cemetery, complete with a miniature village.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

This rooftop sign has been confusing Milwaukee-bound airline passengers for decades.

This storied music venue was once a tavern that housed an Italian Anarchist book club and prohibition parties; today it's a community space for artists and musicians.

The secluded resting place of a local historical figure who perished during the sinking of the Titanic.

As the glaciers retreated out of northern Wisconsin, this unique natural wonder was crafted.

The building was originally a gas station built to resemble a Japanese tea house.

The preserved remains of the former Milwaukee County Hospital for the Insane are hidden in the wooded grounds of County Park.