Ruins of a once-opulent grand Victorian resort.

This former Texas landfill is flush with 300 million-year-old fossils, all fit for the taking.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This historic lighthouse has been reincarnated as the perfect picnic place.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

The only place for a truly presidential dram.

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

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

A former major munitions plant that has been converted into a sprawling art space.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The only recreation of William Shakespeare's indoor playhouse.

This historic mansion was built as a symbol of love between a husband and wife.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.