A miniature train-ride through Slovenia's largest cave system.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

A Memphis park where you can walk the whole Mississippi River in one go.

Visit the monolithic tomb of America's most famous general.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

Ozymandias’ time-keeping temple.

A whimsical bridge adorned with decorative dragons.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

The resting place of a Civil War celebrity's amputated limb.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

Malaysian fireflies create a dazzling display as thousands light up in unison.

The summer home of the largest colony of bats in the world.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

An enormous dragon scales the walls of this 17-story temple.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The world's second-largest sundial, made entirely out of stone.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Morocco's Argania trees are infested with nut-hungry goats.

The largest source of fossilized insects anywhere.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.