A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

A boardwalk winds through this sliver of coastal nature hidden within Sydney.

The platform atop this verdant volcano was built with the help of a royal elephant.

Rainbow-hued in the summer and crystalline in the winter, this salty lake has inspired battles, temples, and plenty of awe.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

A lonely beacon, precariously perched atop a remote sliver of rock.

A fifth-century temple improbably built into the side of a cliff.

A castle perched precariously over the Crimean Sea.

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

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Instead of fruit, the branches of this tree are brimming with hopes and dreams.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

Double spiral staircases are not unheard of, but they are very rare.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

A serene temple with stunning stained glass hides in downtown Dallas.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A corkscrew-shaped barn in Ireland.

This fantastical house shaped like a seashell brings aquatic design to architecture.

The ancient tomb acts as a calendar that keeps perfect time.

A spiral staircase twists to the top of this unusual Czech lookout tower.