A giant 400-acre preserve in North Florida for displaced wolves.

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

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A miniature view of the park, caught in time.

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

In this small strip mall resides the largest collection of original art from the famed TV artist.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

At night, this glittering musical tunnel draws skaters and photographers.

Exquisite irises bloom every spring in this hillside garden.

The fairy tale castle of the "fairy-tale king."

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

The hike to this stunning waterfall on a black sand beach is not for the faint of heart.

Thermal springs underneath the seabed provide the heat and bubbles for these beachside natural hot tubs.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

With over 10,000 lights, this engineering marvel lights up the city after dark.

A spring water stream jumps through a walkable "bridge" cavern and a narrow canyon.

The two massive guns that defended Cartagena Bay.

Peek into a cave of giant, glimmering crystals.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

One of Indonesia's tallest, this waterfall takes a 390-foot plunge into the Lake Toba caldera.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

Experience a charming 1930's version of "infotainment."