A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

An unassuming secret door once led to a legendary watering hole.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The second oldest continuously operating bar in Louisiana.

A celebration of capitalism in Midtown.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

One of only two commuter aerial tramways in the United States.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

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

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

Home of an evil witch famous within southern folklore.

Read a book next to a Midtown waterfall.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

A semi-scholarly approach to sex.

Enormous lake at the bottom of a unique cave system.

The final resting place of New Orleans' most famous voodoo priestess.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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

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