A museum befitting the city responsible for supplying the majority of the world's LSD.

This shop specializes in oddities and Victorian-inspired wonders.

The only theatre in the world constructed specifically for sound movement.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This tiny little island has, as the name says, just enough room for its single house.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

Because sometimes the most efficient route from A to B isn't a straight line.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

The largest earthwork effigy in the world.

No one knows why ancient labyrinths were built on this tiny northern island.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

An ancient stone fortress considered by many to be the eighth wonder of the world.

The library of every book lover's dreams.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This was one of the first (and last) university-built and operated nuclear reactors.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Water of undetermined depth has attracted rare fish and cult leaders alike.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Rippling sand dunes frozen in the Arizona rock.