The beauty of urban decay, hiding some dark secrets.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A celebration of capitalism in Midtown.

A modernist landscape of water and sci-fi concrete.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Elevated freight railway turned wildly successful urban park.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Kenyan restaurant is a carnivore's paradise, serving exotic meats at its ultimate 'Beast of a Feast.'

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.