This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

A mecca for India's Jains.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Centuries-old bridges grown from tangled roots.

The historic villages and towns of Suffolk are filled with wonky wooden beam houses painted an unusual shade of pink. Unknown to many though, this sweet shade has a bloody history.

The lone remnant of a 16th-century palace in Old Goa.

When new viceroys were elected, they passed through this arch to cement the title.

This weekly bazaar started in the 1960s as a way for hippie travelers to barter their goods.

Known as the "Queen of Beach Markets," Calangute epitomizes Goa's beach flea market scene.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This candy-colored storybook village originated as a 19th-century Methodist campground.

A hotel and restaurant serving as the mecca of kitsch.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

An abandoned castle owned and ignored by Masons carries a cursed history.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

This functional solar system model was inspired by the famous Eisinga Planetarium.

A New England curiosity cabinet, one hundred years on.

This state-of-the-art planetarium takes architectural inspiration from the sun itself.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.