A cemetery that holds graves for the forgotten children of a burned orphanage.

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

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

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

The real-life site of Ichabod Crane's infamous gourd attack.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The ruins of an ancient fortification wall sit in front of and underneath this boutique hotel.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

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

It was once nicknamed "the most bombed hotel in Europe."

The only monument to name all of the passengers and crew who died on the RMS Titanic.

This massive monument has been telling the time for 150 years—at a slight angle.

A museum marks and documents the site of the Titanic's launch.

These engineering masterpieces are a dominant feature of the Belfast skyline.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

Commemorating the landing of William of Orange with his European army on their way to the Battle of the Boyne.

A tall karst islet popularized by 007.

According to legend, this rock represents a young girl trapped by an evil ocean spirit.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.