This elaborate towering structure was once famed for its revolutionary height.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

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

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

A strange house built only at night, with rumored mystic inspiration.

A beautiful 62-acre Catholic shrine and botanical garden.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Continuing the tradition of the dime museum in style.

Stroll through a wonderland of stupendous moss-covered trees.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A toxic ghost town sitting atop a massive coal fire.

A one-of-a-kind collection of a unique medium.

A giant Troll lurks under one of Seattle's oldest bridges.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.