This beautiful Miami garden was designed as a laboratory for tropical plants.

Remains of a massive World War II blimp base, now home to a railroad museum.

Have a ball telling the time at this giant kinetic-energy clock.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

An 18th-century townhouse that once hosted guests of the president.

Two statues of the fictitious toy robots that ran afoul of local government

An overlooked memorial honoring the local Washington residents who died in World War I.

Look closely and you’ll notice that the color changes a third of the way up the tower.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

At this bayside marina, enormous wild tarpon jump out of the water to snatch fish from visitors’ hands.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

A city park that sits on top of a freeway.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

This little slice of old Jerusalem in Oklahoma is the evolution of a century-old passion play.

A peculiar forest that was handcrafted for government experiments.

A town pays homage to its namesake.

The ghostly remains of an accidental sea.

Tiki luxury on Nob Hill.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This hands-on museum houses roughly 80 vintage pinball machines and arcade games.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

The park is home to the United States's only still-operating Dutch windmill.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.