Places Mike Walker Wants to Go

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The 1920s child prodigy author was last seen here at her Brookline home before vanishing at age 25.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

A modern temple with an ancient philosophy.

Ride a boat through this magnificent underground world, which now doubles as a theater.

A ghost town revived by hippies and wanderers throws its own special brand of holiday parade.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

A sharp bend in a dramatic river canyon cut through red rocks.

A prized globe signed by Amelia Earhart and Charles Lindbergh sits in the Brooklyn office of the American Geographical Society.

The oldest continuously inhabited street in America.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

The world’s largest collection of Tiffany glass sits in a warehouse in Queens.

A winding, cliffside stretch of road overlooking the Delaware River.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

This small, hidden cove is home to abandoned boats.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

The loneliest island in New York.

A natural gas leak provides a flickering flame beneath a waterfall.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.