Every equinox this Maya pyramid puts on a spooky ancient light show.

A walk through the historic city center, under the streets of Seattle.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

This landmark cemetery in Boston was created more than 300 years ago.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The site of Paul Revere's historic two lantern warning.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

A beautiful Victorian-era cemetery, complete with a miniature village.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

A relic of FDR's brief foray into utopian urban planning.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.