diff --git a/include/openmc/distribution_multi.h b/include/openmc/distribution_multi.h
index 493ad85e07..1b1a262b82 100644
--- a/include/openmc/distribution_multi.h
+++ b/include/openmc/distribution_multi.h
@@ -43,6 +43,11 @@ public:
   //! \param seed Pseudorandom number seed pointer
   //! \return Direction sampled
   Direction sample(uint64_t* seed) const;
+
+  // Observing pointers
+  auto mu() const { return mu_.get(); }
+  auto phi() const { return phi_.get(); }
+
 private:
   UPtrDist mu_;  //!< Distribution of polar angle
   UPtrDist phi_; //!< Distribution of azimuthal angle
diff --git a/include/openmc/distribution_spatial.h b/include/openmc/distribution_spatial.h
index f3c7bb67d4..8d5017a81e 100644
--- a/include/openmc/distribution_spatial.h
+++ b/include/openmc/distribution_spatial.h
@@ -32,6 +32,11 @@ public:
   //! \param seed Pseudorandom number seed pointer
   //! \return Sampled position
   Position sample(uint64_t* seed) const;
+
+  // Observer pointers
+  auto x() const { return x_.get(); }
+  auto y() const { return x_.get(); }
+  auto z() const { return x_.get(); }
 private:
   UPtrDist x_; //!< Distribution of x coordinates
   UPtrDist y_; //!< Distribution of y coordinates
@@ -50,6 +55,11 @@ public:
   //! \param seed Pseudorandom number seed pointer
   //! \return Sampled position
   Position sample(uint64_t* seed) const;
+  
+  auto r() const { return r_.get(); }
+  auto phi() const { return phi_.get(); }
+  auto z() const { return z_.get(); }
+  auto origin() const { return origin_; }
 private:
   UPtrDist r_; //!< Distribution of r coordinates
   UPtrDist phi_; //!< Distribution of phi coordinates
@@ -70,6 +80,11 @@ public:
   //! \param seed Pseudorandom number seed pointer
   //! \return Sampled position
   Position sample(uint64_t* seed) const;
+
+  auto r() const { return r_.get(); }
+  auto theta() const { return theta_.get(); }
+  auto phi() const { return phi_.get(); }
+  auto origin () const { return origin_; }
 private:
   UPtrDist r_; //!< Distribution of r coordinates
   UPtrDist theta_; //!< Distribution of theta coordinates
@@ -92,6 +107,8 @@ public:
 
   // Properties
   bool only_fissionable() const { return only_fissionable_; }
+  Position lower_left() const { return lower_left_; }
+  Position upper_right() const { return upper_right_; }
 private:
   Position lower_left_; //!< Lower-left coordinates of box
   Position upper_right_; //!< Upper-right coordinates of box
@@ -112,6 +129,8 @@ public:
   //! \param seed Pseudorandom number seed pointer
   //! \return Sampled position
   Position sample(uint64_t* seed) const;
+
+  auto r() const { return r_; }
 private:
   Position r_; //!< Single position at which sites are generated
 };
diff --git a/include/openmc/source.h b/include/openmc/source.h
index 97b18d2286..aaa0f48e0f 100644
--- a/include/openmc/source.h
+++ b/include/openmc/source.h
@@ -43,7 +43,14 @@ public:
   Particle::Bank sample(uint64_t* seed) const;
 
   // Properties
+  Particle::Type particle_type() const { return particle_; }
   double strength() const { return strength_; }
+
+  // Make observing pointers available
+  auto space() const { return space_.get(); }
+  auto angle() const { return angle_.get(); }
+  auto energy() const { return energy_.get(); }
+
 private:
   Particle::Type particle_ {Particle::Type::neutron}; //!< Type of particle emitted
   double strength_ {1.0}; //!< Source strength