Rowdy rebels fortified this home during the first popular uprising in United States history.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

The world's largest public collection of PEZ memorabilia.

Destructive children, start your engines.

The last street in Pittsburgh that's paved with wood.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

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

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

This free, take-a-book shop seems like a trick but isn't.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.