Vikings and Evangelicals have both had a hand in this replica medieval church.

This cave holds a surprisingly colorful variety of geological oddities.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Shop of curiosities with a dinosaur museum tucked in its basement.

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

This large midwestern cavern features impressive rock formations and an underground waterfall.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

A mysteriously dark cemetery monument fuels stories and legends galore.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

You can spend the night in Dr. Frank-N-Furter's castle.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

This natural sea arch highlights Ireland's rugged coastal beauty.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."