A multiversal transit station located right below a highway interchange.

A downtown park built on top of unclaimed graves.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

Come for the 14-foot-long taxidermy alligator. Stay for the mini costumed gators shooting pool.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

A spooky defunct railroad tunnel now part of a sprawling trail.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

World's largest carved onyx figure stands as a tribute to enduring peace.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A museum within a museum, devoted to history's most questionable medical devices.

These curious caverns have been home to mushrooms, gangsters, and disco.

The hot chocolate here all stems from small, sustainable microproducers in Chiapas and Tabasco.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

This restaurant serves wood-fired fare served in a natural cave with a live spring.

A huge museum of much more than just agriculture displayed in a princess's palace.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

In Egypt's expanding metro area, many of the neighbors are dead.

This Moab institution functions as both a rock store and a small natural history museum.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

It's safe—and permitted—to walk across these twin natural sandstone arches.