A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Visit this playground of waterfalls, caves and sinkholes.

These early tent-shaped grave coverings are unique to Appalachia.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

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.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

One of the last Jazz Age "Wonder Theaters" in New York City.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A very classy 1920s-era bar right in Grand Central Station.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Sniff the Titan Arum's rotting flesh.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A terrific purveyor of natural history objects and curios.

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