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Zack, Nick and Aaron explore an old jail with two fans in Charleston, SC

Zak, Nick and Aaron delve deep into the Shanghai Tunnels in Portland, OR.

The crew investigates an unsolved murder at a historic Denver mansion.

Zak, Nick and Aaron engage in a two-part lockdown in Bisbee, AZ.

Zak, Nick and Aaron return to Nevada City to investigate a hotel and caves.

The crew explores the Riviera Hotel with a few special guest stars.

Zak, Nick and Aaron explore the dark secrets of London's Hellfire Caves.

Zak, Nick and Aaron hunker down inside the ruins of England's Fort Horsted.

Zak, Nick and Aaron head to Chicago for a two-night, two-location lockdown.

Zak, Nick Aaron explore one of America's most haunted lighthouses.

Zak, Nick and Aaron head to the Great Lakes to explore demonic activity.

The crew heads Greenfield, Indiana, to find the source of a dark power.

The crew investigates a Cincinnati rectory plagued by a demonic entity.

The crew travels to the historic mining town of Cripple Creek, CO.

Zak, Nick and Aaron head to the once famous Brookdale Lodge in California.