These markers are used to document elevation changes around the famed dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

Mass grave of 50 unidentified French Soldiers who died at the Siege of Yorktown, 1781, that gave victory to the American Revolution.

The location where the American Revolution ended.

A church now sits over the site of one of the worst urban disasters of early 19th-century America.

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

This estate on the banks of the James River was home to a Founding Father, two presidents, a famous bugle melody, and what some say was the actual first Thanksgiving.

Enjoy dishes that founding fathers once ate at this Colonial Williamsburg pub.

Dine like an American revolutionary at Colonial Williamsburg.

A collection of vehicles across American military history.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A natural wonder in south Denmark.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

This tiny island is home to the world's largest colony of Northern gannets.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

The heads of two giant mythological water horses honor Scotland's horselord past.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

In 1396, two Scottish clans that had been violently feuding for centuries finally faced off in a bloody battle in this park.

Several bricks indicate the various flood levels this crossing has survived over the centuries.