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

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

A dilapidated dock tells the story of Titanic's missed arrival.

New York City's smallest piece of private property.

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

Elevated freight railway turned wildly successful urban park.

This otherworldly church spire reaches up toward the heavens.

This elaborate towering structure was once famed for its revolutionary height.

The world's largest piece of copyrighted artwork.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A museum celebrating the Victorian obsession with hair art.

At 207 feet, one of the world's longest continuous escalators.

Home to items never before seen by the public.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

This giant Massachusetts sycamore is said to hold the dubious distinction of being the "widest tree East of the Mississippi!"

This playground sculpture of an icon from the past is dedicated to the children of the future.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

A speakeasy takes on Chicago's drinking culture.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Community bookshelf of 25-foot-tall book spines.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.