Places Edited by Eric Grundhauser

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

The headquarters of a secretive order is also a beautifully-designed park.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

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

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

This Scottish bridge seems to compel dogs to leap to their death.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A swing to dangle you off the very edge.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

This neighborhood thoroughfare is haunted by dozens of homemade monsters.

A 16th-century horror show built in a lovely Italian garden.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The world's largest covered wagon is piloted by a giant Lincoln lawyer.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.