This colorful gate stands as an entrance to the walled city of Old San Juan.

A natural swimming pool in the middle of the Carite Forest.

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

The world's brightest bioluminescent bay.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

One man's unrequited love stands in a glass box forever.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

A winding district gerrymandered into the shape of a mantis.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The oddly shaped, steam-spewing building is now an art studio and gallery.

This quirky curiosity shop takes its cues from the world's bazaars.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Elevated freight railway turned wildly successful urban park.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The romance of early commercial flight still fills this Art Deco destination.

The rogue roots are gradually consuming some of the historic marble grave markers.

Remnants of a storybook amusement park hidden behind a strip mall.