This active volcano's siren song to suicide jumpers forced authorities to build a fence.

We heard you like volcanoes so we put a volcano in your volcano so you can die for sure...

Meet the world's longest tapeworm in a collection that really gets under your skin.

Not quite the menace it once was, this monster still has some chops.

Fine dining in the bizarre world of Lewis Carroll.

A magical place that lets you play in and explore the world of Studio Ghibli.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A rare view of a preserved Victorian science museum.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

This elaborate towering structure was once famed for its revolutionary height.

These medicine cabinet staples are part of the museum's collection of everyday objects.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

America's first serial killer rests in anonymity.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

Hundreds of antiquated typewriters and office machinery show the technological evolution of business.

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.

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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

An unusual and eclectic collection of local historical memorabilia.

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

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

Vines grow up the metal bars in this public park created from an old machine factory.