A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The most decorated dog of World War I is preserved in the Smithsonian.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The walls of the iconic dome are hollow and have a secret stairway.

There’s a hidden military meme engraved on the World War II Memorial.

The site of the climactic scene from the classic horror film is now a historic landmark.

This futuristic German television spire is actually the world's largest digital clock.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

A musical instrument played by the sea.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

A ruined castle stands atop a hill surrounded by dragon lore.

This ornate Weser Renaissance house was also the home of an infamous witch hunter.

An intricate and amazing house built by architect Karl Junker.

The monumental home of Prussia’s eccentric "Cannon King."

An abandoned church gets a second life as a massive beer hall and event space.

The site where Poe “in great distress, and ... in need of immediate assistance” likely died.

Once America's tallest structure, now a Baltimore landmark.

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”

The trials and tribulations of marking Poe’s grave.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

An eerie, decaying ghost town destined to fade into the forest.