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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Historic site where Native American hunters once trapped and killed buffalo.

The site of Paul Revere's historic two lantern warning.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The Boston square dedicated to the dark poet who was born nearby.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

A gallery of underwater art that can be visited by man and fish alike.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

These eclectic homes nestled into the cliffs of a Caribbean island were built entirely from scavenged materials.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Commemorating the spot where the famous scientist fed his pigeons.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Historic medieval fortified city in southwest France.