Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.

Discover the geologic history of the Mono Basin with a walk into the middle of Panum Crater, a plug-dome volcano. Reservations are not needed for this tour. Top photo by Fairy Noorzay.