Found down a long dirt road, a sacred Mexican cenote and 18th-century hacienda remain hidden.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A tree meticulously shaped and trimmed into the shape of an elephant.

The romantic botanic tunnel feels like a well-kept secret.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

A delightfully quirky blend of oddities spread throughout an old 1920s bank.

One of the world's smallest city parks is only 12 by 20 feet.

This square in downtown Eugene is dedicated to the novelist and countercultural figure Ken Kesey.

This 85-foot-long table is made from a single slice of an old-growth Douglas Fir.

Spectacular volcanic cliffs along the Crooked River invite hiking, rock climbing, and photography.

This incongruous small ferry across the Willamette River north of Salem, Oregon has been operating continuously since the 1850s.

This coastal rock formation resembles a churning cauldron at high tide.

Contractors in this Oregon town have been stamping their names in sidewalks since 1908.

Atop an active stratovolcano, two lakes separated by a narrow strip of land.