This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

Flames have been burning within this mountain for more than 2,500 years.

Tour the sci-fi-esque reality of governmental disease management.

An old town theater converted into a celebration of the hobo legacy.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

An ancient city hidden in the heart of the Sierra Nevada mountains.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

Step into a cartoon at this Seoul café that aims to evoke a two-dimensional scene.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

The longest navigable underground river in the United States is home to countless blind and albino animals.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

35,000 grape hyacinths flow like water down a garden hill.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

These towering cliffs jut dramatically from the middle of a barren desert.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

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

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

A wealth of plants and horticultural curiosities fill this charmingly antique museum.

A brightly colored natural bridge formed by mineral-rich hot springs high up in the Andes.