This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

An unusual round church in London with a Templar past.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The oldest experimental corn field in America is still creating better ways to grow crops.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The quaint little Vermont town played a quaint little Connecticut town in Tim Burton's "Beetlejuice."

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

This unusual building straddles two countries.

Cryptid lake monster honored with its own monument.

This "common-as-dirt" museum celebrates the glory of normalcy.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Two distinctive homes on a New England village green look like a couple of frosted wedding cakes.

The highest peak in the state of Vermont has some interesting features.

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The United States Capitol's former columns still stand.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Go take a picture with the inventor of the daguerreotype photographic process.

A much-maligned monument to teetotalism.

100 massive sculptures in the Hudson River Valley.