Peanut butter trees and miracle berries are just the beginning.

The National Park Service’s best-kept secret with views that rival any in D.C.

This remote camping site offers incredible stargazing opportunities.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

In the foothills of the lesser Caucasus, a centuries-old fortress still stands.

This hidden art nouveau gem was designed by an architect in search of a national style.

A seemingly unassuming palace near Budapest hides a stupendously decorated hall.

Swim alongside softshell turtles in these turquoise waters within the Cuatrociénegas Biosphere Reserve.

Science fiction's grandfather has a fittingly marvelous tomb.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

This precariously perched fortress was once ruled by a crow-worshipping baron.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Legend says these stone structures are where the doomed citizens of a vanished village sent themselves to die.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

A startling, centuries-old subterranean marvel hides in plain sight.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Elaborate hand-carved wooden clocks two brothers made in their spare time are on display at this handsome little museum.

The history of radiation is on safe display at the foot of a radiation science laboratory.

These small, triangular, colorful houses are a staple of Madeira Island.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

Snow-capped peaks, colorful waterfalls and stunning vistas on the edge of the Himalayas.

The origin of this sinisterly shaped forest is rooted in mystery.