He began to travel alone, thinking only of Kṛṣṇa, through various holy places like Ayodhyā, Dvārakā and Mathurā. He traveled where the grove, hill, orchard, river and lake are all pure and sinless and where the forms of the Unlimited decorate the temples. Thus he performed the pilgrim’s progress.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
पुरेषु पुण्योपवनाद्रिकुञ्जे- ष्वपङ्कतोयेषु सरित्सरःसु । अनन्तलिङ्गैः समलङ्कृतेषु चचार तीर्थायतनेष्वनन्यः
pureṣu puṇyopavanādrikuñje- ṣvapaṅkatoyeṣu saritsaraḥsu | anantaliṅgaiḥ samalaṅkṛteṣu cacāra tīrthāyataneṣvananyaḥ
SB 3.1.18