The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

After Christopher Columbus died, his son built a fancy house to rule from.

Built in 1512, the oldest cathedral in the Americas.

An eccentric German artist built this weird and wondrous castle packed with shocking sculptures and alien art.

Hundreds of pieces of ancient Taíno art cover the walls of this Caribbean cave system.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Historical trolley restoration and operation at History San Jose, Kelly Park.

This painted marvel is San Francisco's 400-foot ode to urban biking.

This quirky roadside attraction dives into the many theories surrounding North America's most infamous hairy cryptid.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Home to the "Circus" trees created by Axel Erlandson.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Four hundred granite steps were built into this massive rock by the National Park Service.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Quite simply the largest tree in the world (by volume).