Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Mosaics, storks, and brothels—this ancient city has it all.

Founded as a refugee camp, now a popular tourist spot.

The mirrored section takes the shape of Hebrew characters when viewed from above.

This watchtower once presided over the Berlin Wall.

Tiny memorials honor individual victims of the Holocaust.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

An eerie smiling woman looms above the granite tombstones.

Over 120,000 curious objects that have shaped our modern world.

In an effort to escape the horrors of slavery, one man mailed himself to freedom.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The narrowest house in America is seven feet of pure spite.

New Hampshire's first neighborhood is now preserved as a historic village with live action role players.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.