Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

A sacred mountaintop temple offers a fine cup of tea to visitors who can survive the journey.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

A pagan tradition of draping trees with rags eerily lives on.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

This collection of French root art looks like an indoor fairy wonderland.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

This fairytale-like structure is the last turf church ever constructed in Iceland.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

One of only two pod-shaped homes designed by Frank Lloyd Wright.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

This historic little railroad runs through some of the most beautiful scenery in Germany.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

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

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

The summit Roosevelt conquered before he descended to become The Chief.

Dozens of houses in the Adirondack Mountains are reminders of a literal "cottage industry" to cure people of a deadly disease.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.