The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

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.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A saintly relic hidden in a Prague church basement.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

An activist who committed her life to peace and women's suffrage.

A monument stands to the famous suffragist who penned the declaration for women's equal rights, including the right to vote.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The seat of Buffalo government is a gorgeous Art Deco palace.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

A decorated war pigeon stands guard in eternal taxidermied rest at his alma mater.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Collection dedicated to brands, packaging and advertising.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.